And thats why those units are still seeing reasonable growth even after covid. 

A good broker should be able to tell you a range of rates given specific criteria if you can tell them what kind of deals you are exactly looking at (ex. in central Boston, 10-20 unit, 90%+ occupancy, 30% down).

Hey @Guang Yang, no need to use any kind of extra stuff for a single unit like @Patricia Andriolo-Bull said.Just use the built in tools on VRBO and AirBNB and you will do just fine.

. :) We currently have 24 units and looking to at least double that in 2025.    

I am showing 2-4 unit properties all the time here in Phoenix and I can send you the recent closings and listings I have been working on.

I'd recommend looking at costs. your build cost is going to be well over other homes because of the fixed costs like slab, Hvac, roof, etc. check the market drivers and weight the benefits of short term versus long term. long term is no furniture and help pays mortgage but at this size it doesn't really cover everything. we didn't find a lot of economies of scale in single family detached. can you build more than one unit?

It's now a really lovely 3/2 unit, but I'd love to turn it into two separate units; 2/1 and 1/1. 

Even if one unit is vacant, others can keep cash flowing​​.Short-Term Rentals in Tourist Areas:Think vacation homes or properties in bustling city centers.

I think everyone's situation is different, and when one crafts their buy box, they need to consider their current family and finances.For me, when I started, I wanted to buy 2-4 unit distressed properties in neighborhoods I wanted to live. 

@Ilia Zakharav, There's no problem in selling individual units and 1031 exchanging them as individuals.