STRInvest – Short-Term Rental Analyzer

Here's how most people analyze a short-term rental investment today.

Open Zillow. Find a property. Copy the address into AirDNA. Pull up a mortgage calculator. Open a spreadsheet for cap rate. Google the city's STR regulations. Hope you didn't make an error copying numbers between tabs.

AirDNA alone costs $40/month. And none of these tools talk to each other.

I built STRInvest to collapse that workflow into one side panel on the listing page itself.

What it does

Open any property on Zillow, Redfin, or Realtor.com. STRInvest activates in the side panel automatically and shows:

• Projected Airbnb revenue — pulled from live Airbnb search results, same zip code, same bedroom count, upcoming weekends

• Cap rate — calculated from the listing price, projected revenue, and expense assumptions

• Cash-on-cash return — based on your down payment and mortgage terms

• Local STR regulations — covering 97 US cities, so you know before you fall in love with a property

All inputs are adjustable. The defaults (68% occupancy, 35% expense ratio, 30-year mortgage) are industry-standard starting points, not black boxes.

The stack

Chrome Extension (Manifest V3) — content scripts + side panel Railway server for auth and usage tracking Live Airbnb data pulled on demand Regulations database covering 97 cities, updated quarterly

Pricing

Free: 3 full analyses per month Pro: $9.99/month — unlimited analyses + CSV export

Honest launch numbers

Installs: — Revenue: $0 Reviews: 0

The distribution angle

Every "is this a good Airbnb investment?" question on Reddit, every first-time STR investor Googling "how to calculate cap rate," every person searching "STR regulations [city name]" — that's the audience. Four long-form articles live already. Comparison post against AirDNA is the highest-intent traffic target.

What's next

Organic search from the content. Direct presence in r/realestateinvesting and r/airbnb threads where people are manually doing exactly what STRInvest automates.

If you've analyzed a short-term rental investment — what part of the process took the most time? That's what I'm trying to make instant.