One of the biggest challenges I kept running into when analyzing small multifamily deals was figuring out the best strategy mix across units. A lot of the upside in duplexes and triplexes comes from combinations like:

- STR one unit, long-term the other
- Mid-term for traveling professionals
- Owner-occupying one unit while optimizing the rest
- Comparing hybrid strategies vs all long-term

Most calculators assume a single strategy for the entire property, which makes it hard to see the true potential of a deal. To solve this, I built Unitrix RE, a strategy analysis tool designed specifically for small multifamily and house-hack investors. One thing I noticed in my own underwriting was how much time I spent going back and forth with AI or browsing listings trying to estimate rents, occupancy, and expenses.

With Unitrix, the built-in AI auto-populates estimated rental rates, occupancy assumptions, and typical expense ranges for the property. You can then adjust everything based on your local knowledge or risk tolerance — it’s meant to give you a realistic starting point instead of building the model from scratch.

The platform also lets you:

- Add multiple units
- Assign different strategies to each (STR, MTR, LTR, or live-in)
- View a strategy matrix that shows different combinations and highlights the highest-performing scenario
- Compare cash flow and performance across strategies
- Save properties and come back to them as you refine your analysis

It’s live here: https://unitrixre.com/

There’s a free version to explore the analysis, with paid plans for saving deals and advanced features. I built this as an investor to solve my own underwriting workflow, and I’m continuing to improve it based on real use. I’d be interested to hear from the BiggerPockets community:

- How are you currently estimating rents and expenses when analyzing a new deal?
- Do you look at mixed STR/MTR/LTR strategies, or stick with one approach per property?
- What would make a tool like this more useful for your underwriting process?

If anyone wants to run a real deal through it and share feedback, I’d appreciate your thoughts.