INDEX / BUSINESS IDEAS / SIDE
30 ANALYZED · 12 SAY BUILD
Side business ideas
IdeasBerg has analyzed 30 side business ideas from Greg Isenberg's videos: 13 earn a BUILD verdict, 15 earn MAYBE, and 2 earn SKIP. The data leans toward local services and agency models as the most accessible entry points — lowest investment starts at $100, realistic ARR ranges from $12K to $1.5M depending on the idea. If you have 6 months and limited capital, the evidence here points toward a physical local service or a niche solo agency over anything requiring a SaaS build.
The 13 BUILD ideas cluster around two archetypes: physical local services (mobile diesel mechanic, lawn care, power washing, student storage, mobile car detailing) and skill-based agencies (niche Facebook ads, service-to-SaaS funnel, startup studio). Initial investment across BUILDs ranges from $800 for power washing to $50,000 for a startup studio, with the median well under $15,000. That range makes local services the clearest on-ramp for someone starting without capital or a technical background.
The 15 MAYBE verdicts are not rejections — they flag meaningful execution risk or market saturation. Notably, both acquisition-based ideas (SBA loan-powered acquisition and the digital-layer acquisition play) land in MAYBE territory, with the SBA idea explicitly warning that acquirers often 'buy themselves a job.' The 2 SKIP verdicts both involve SaaS products in saturated AI-idea-generation markets, where free alternatives from large incumbents structurally cap the ceiling for a cold-start founder.
Automation scores across all 30 ideas run from 2 out of 10 (lawn care, power washing, farmers market) to 9 out of 10 (micro app studio). That gap matters for a side business specifically: if you are keeping a day job, ideas scoring 5 or above on automation — like niche online directories (7/10) or niche gig economy media (6/10) — are structurally friendlier to a constrained schedule, even if their headline ARR is more modest.
THE IDEAS — VERDICT-SORTED, BUILD FIRST
- Diesel Dudes — Mobile Diesel Mechanic ServiceBUILD · BERG 80 · ARR $240K–$1.4M
A mobile diesel mechanic business serving commercial and personal diesel vehicle owners in underserved tier-2 cities, generating $30K+/month by coming to the customer.
- Service Business → SaaS FunnelBUILD · BERG 71 · ARR $60K–$2.5M
Start a service agency in a specific niche to learn customer problems firsthand, then productize the solution into a SaaS or physical product sold to the same customer base.
- Startup Studio / PHC Incubator (Service Business → Studio Model)BUILD · BERG 71 · ARR $500K–$10M
Build an agency or service business that generates predictable cash flow, then use that cash to incubate and acquire digital products every 12-24 months under one holding company umbrella.
- Sweaty Startup Local Services BusinessBUILD · BERG 70 · ARR $150K–$1.5M
Launch a boring but profitable local service business (pest control, lawn care, power washing, HVAC) in an underserved market where competitors are unsophisticated and demand is structurally growing.
- Niche Facebook Ads Consultant (Non-Douchey Solo Operator)BUILD · BERG 70 · ARR $60K–$350K
A solo paid-ads consultant who specializes in a specific vertical (e.g. wellness retreats, salons, female founders) and charges on a revenue-share basis instead of a retainer.
- Niche Gig Economy Media EmpireBUILD · BERG 68 · ARR $80K–$600K
Build a multi-platform media business targeting a specific gig economy vertical (rideshare, delivery, etc.) with a blog, podcast, YouTube, and email list monetized via affiliate deals and sponsorships.
- Mobile Car DetailingBUILD · BERG 68 · ARR $80K–$250K
Offer premium on-location car detailing services, generating $120K+/year as a solo operator fresh out of college.
- Blue-Collar Local Services + Google Maps SEO AgencyBUILD · BERG 65 · ARR $120K–$800K
Start a window cleaning/power washing/lawn mowing business, master Google Maps ranking, then sell that marketing playbook as an agency to other local service businesses.
- Pick-Up & Delivery Student StorageBUILD · BERG 65 · ARR $80K–$600K
Run a seasonal student storage company that picks up boxes from dorms at move-out, stores them over summer, and delivers back at move-in — charging premium prices with a website and streamlined operations competitors lack.
- Lawn Care CompanyBUILD · BERG 61 · ARR $60K–$300K
Run a residential lawn care business with minimal marketing — bandit signs alone can generate $100K/year working nine months.
- Power Washing ServiceBUILD · BERG 60 · ARR $40K–$200K
Start a power washing business with minimal investment to clean driveways, decks, and concrete for residential and commercial customers.
- IdeaBrowser (Greg's Own Product)BUILD · BERG 57 · ARR $100K–$600K
A daily startup idea feed that automatically scans Reddit, Facebook groups, and Google Trends to surface actionable business ideas with feasibility scores and suggested offer structures.
- Unsexy Business + Digital Layer Acquisition PlayMAYBE · BERG 63 · ARR $300K–$5M
Acquire traditional offline businesses (accounting firms, dental practices, salons) that serve loyal communities and layer on digital products, education content, and upsell revenue streams.
- AI-Powered Daily Business Idea Catalog (IdeaBrowser)MAYBE · BERG 62 · ARR $120K–$1.5M
A subscription platform that delivers daily AI-curated startup ideas with trend data, build playbooks, pricing suggestions, and an AI agent to validate ideas.
- BizBuySell AI Deal ScreenerMAYBE · BERG 60 · ARR $24K–$120K
An AI agent that pulls small business listings from BizBuySell and similar marketplaces, cross-checks financials and web mentions, and produces a rapid 'should I even call?' memo for prospective buyers or acquisition entrepreneurs.
- Mom-and-Pop Digital Marketing Agency (Vertical-Focused)MAYBE · BERG 60 · ARR $120K–$600K
A niche digital marketing agency that helps one specific category of small businesses (e.g., jewelers, pizza shops, auto dealers) get found and grow on modern ad platforms.
- Niche Online Directory BusinessMAYBE · BERG 59 · ARR $12K–$180K
Build keyword-matched, SEO-driven online directories in specific niches and monetize through sponsorships, affiliate links, paid listings, or selling to SaaS companies.
- Vibe-Code-to-Flip: Serial Micro-SaaS Builder & SellerMAYBE · BERG 59 · ARR $50K–$240K
A one-person business model of weekly building AI-assisted micro-SaaS tools from trending ideas and flipping them on marketplaces for $5K–$25K each.
- Bar Drink Cover Sticker BusinessMAYBE · BERG 58 · ARR $40K–$800K
Sell branded recurring-order rolls of anti-drink-spiking stickers to bars, using free advertising space on the stickers to monetize a second revenue stream.
- Micro Monopoly Niche App StudioMAYBE · BERG 57 · ARR $60K–$1.2M
A one-person (or tiny team) studio that rapidly builds and launches niche-specific micro-apps for small engaged communities, monetizing each at $50-$100/month with agent-run operations.
- Plumbing Services Aggregator / Lead MarketplaceMAYBE · BERG 54 · ARR $150K–$1.2M
An SEO-driven aggregator and lead marketplace for local plumbing businesses, capturing high-intent organic traffic in an underbranded, fragmented trade services market.
- Hands-On Craft Business-in-a-BoxMAYBE · BERG 54 · ARR $80K–$600K
A modern, scalable 'craft experience' franchise that arms local artists and Etsy sellers with branded supplies and educational kits to host pottery, painting, and drawing events in restaurants, homes, or pop-up spaces.
- Leveraged Agency: AI-Automated Boring Task BusinessMAYBE · BERG 54 · ARR $60K–$600K
Start a service agency doing one soul-crushing manual task (e.g. invoice processing, customs paperwork, insurance forms), learn every edge case in 3-6 months, then replace human labor with AI agents to 10x clients at 80% margins.
- Bounce House Rental BusinessMAYBE · BERG 54 · ARR $30K–$150K
Rent inflatable bounce houses for kids' parties and events, generating recurring weekend revenue with minimal ongoing labor.
- Programmatic SEO Lead-Gen FranchiseMAYBE · BERG 49 · ARR $100K–$2M
Build 5,000+ geo-targeted landing pages for underserved home service keywords and sell the resulting leads — or the entire lead-gen business — to aspiring entrepreneurs as a franchise alternative.
- Farmers Market Organizer & OperatorMAYBE · BERG 48 · ARR $80K–$600K
A scalable business that identifies underserved towns, organizes recurring farmers/flea markets, and manages merchant relationships and logistics for a cut of revenue.
- Permissionless Apprentice Content StudioMAYBE · BERG 42 · ARR $60K–$1.2M
Build a niche audience on X/LinkedIn by visually translating ideas from famous thinkers into a signature graphic format, then monetize through digital products and community.
- SBA Loan-Powered Small Business AcquisitionMAYBE · BERG 32 · ARR $150K–$800K
Use SBA loans combined with seller financing to acquire cash-flowing small businesses with minimal equity down, then either operate or place a manager to run them.
- Startup Idea Catalog SaaS (IdeaBrowser Clone)SKIP · BERG 30 · ARR $150K–$2M
A subscription SaaS that delivers daily AI-curated startup ideas with founder-fit scoring, a searchable idea database, and AI agents to help validate and develop selected ideas.
- SBA Loan Deal Sourcing & Brokerage ServiceSKIP · BERG 27 · ARR $200K–$2M
A specialized advisory or brokerage service that helps first-time small business acquirers source deals, structure SBA financing, and close their first acquisition.
QUESTIONS PEOPLE ASK
- Which side business ideas require the least money to start?
- Power washing tops the list at $800 to start, followed by the niche Facebook ads consultancy at $500 and the niche online directory business at $100. All three carry BUILD or MAYBE verdicts, so low entry cost does not mean low quality — power washing is a BUILD at berg 60/100 and the ads consultancy is a BUILD at berg 70/100.
- Which side business ideas have the highest earning potential?
- The startup studio model shows the widest ARR range at $500K–$10M, followed by the unsexy business acquisition play at $300K–$5M and the service-to-SaaS funnel at $60K–$2.5M. However, all three carry significant time and capital requirements — the startup studio alone calls for 500 hours and $50,000 upfront — so high ceiling and accessible side project are not the same thing here.