Will It Flow

Will It Flow is a full-stack rental analysis SaaS I built and operate. It solves a specific problem for real estate investors: knowing whether a rental property will cash-flow before putting in an offer.

The problem. Evaluating a rental property's cash-flow potential requires pulling data from at least four sources — Freddie Mac mortgage rates, comparable rent prices, local market data, and HUD fair-market rents — then running projections across 5 to 30 years with multiple financing scenarios (conventional, BRRRR, house hack). Investors were doing this in spreadsheets, one property at a time.

What was built. A web application with a real-time cash-flow calculator, live Freddie Mac rate feeds, automated rent comps and listing data from Redfin, HUD data integration, and PDF deal sheets for sharing with partners or lenders. The frontend is Next.js with TypeScript, the backend is Supabase with row-level security, billing is Stripe, and the hosting is Vercel.

Programmatic SEO. The site generates thousands of landing pages for specific markets — one per city and zip code — each with live rental data. These pages rank organically and drive the majority of new-user acquisition.

The outcome. A live product with paying subscribers, a growing organic traffic base, and an architecture that handles daily data refreshes across thousands of market pages without manual intervention.