Loan size?

Depending on the size and location of the acreage, I would split off part of it and subdivide and sale as business or house lots. 

When consumers are sick and tired of being sick and tired of shrinkflation and quit buying certain products then the prices will drop or sizes will come back.

Generate a list from propstream of the kinds of properties you're looking for (high equity, certain size, location, age, etc).

Have your Real get a contract over there to size up issues and costs of repair. 

rent by the room, rent by the unit (small MF), rent out an ADU, etc.If you plan on renting by the room, then maybe more square footage and potential rooms to rent.If it is small multi-family, then you can look at similar size rentals to see what their market rates are or use programs like Rentometer.com or BP rental rate calculator. 

This type of financing will typically look very different and more like a traditional commercial real estate loan.That means a DSCR calculated based on a full NOI and expense load (so inclusive of vacancy loss estimates, credit loss estimates, repairs and maintenance, utilities, management fees and more – in addition to the property taxes and insurance expense that are the only expenses factored in on traditional residential style DSCR loan financing).Additionally, the DSCR minimums are generally going to be higher (typically up to 1.25x), the loan to value ratios lower (higher down payments) and underwrite more sophisticated (which makes sense considering the size and scope of the property).Many multifamily investors for properties of this size (such as more than 11 units) can syndicate capital and have more sophisticated financial and entity structures – its definitely a different world once you get up here in unit count.In Conclusion – when you are looking to invest in multifamily real estate and finance your investment – make sure you have the unit count in mind before you start shopping – the unit range can have a huge effect on your options.

Especially when you've got such a small sample size. 3 tenants folks.

Should I just consider bed/bath and size and compare the median sell price across the area?

Look at your local competition on Vrbo and Airbnb and change search criteria for different size houses.