have a rental (multi family 2-4 units) needing major rehab. interested in learning what work can be learned/performed easily and what needs to be hired out to a contractor. recommendations for learning resources for DIY rehab (good youtube channels, etc) would greatly appreciated!

I intend to add a closet to the den and make it a 3 bedroom adding value as well as remodel the entire unit.

Good grief you're wanting to sue because your unit didn't rent?

Guesstimates are around $1000 per unit. 3) Demand is crazy right now.

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).

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?

The offering would be at 490 units at $1000 unit

we have a development in this area that should be completed in the next 6 months, 2 units. 

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.

One of the units is currently rented, so it would probably be great for a house hack.