I will take them yesterday  come out to my Job site in oregon  www.ivyridgeestatescanby.com and you will see 80% of the workers on site are hispanic.. tile guys are Russian.. 

4) No underlayment for the flooring in the kitchen, and the thin floor tile needs to be trashed and the whole thing re-doneThe only thing this contractor seemed to be experienced at is framing, drywall and painting.

My husband built a stand up shower and completed a lot of tiling.

House Hacking is how we started - and did a lot of the updates ourselves in both units (new flooring, tile, etc). 

For 20k in rehab you should have a new ac and furnace, hot water heater, updated plumbing, a new sink in the kitchen and bathroom, laminate flooring in the kitchen, new tile work in the bathroom, refinished floors, new ceiling fans, some light exterior work and some misc etc.

Calculating the depreciation base, typically guided by a CPA, is the primary complexity.Except figuring out the depreciation base to use (what amount from the total acquisition cost goes for land and can’t be depreciated, and how much goes for the building/improvements to be used in the segregation and depreciation calculations, and even that should be an easy answer to figure out or get from your CPA), the rest is simple stuff your CPA will not know anyway (thus him sending you the “survey”) like, the sqft of the house, the length of the fence and if wood/iron/brick, how many ceiling fans in the house, how many cars garage, if carpet or tile in what room, etc.

We prefer tiled tub/shower surrounds and so do the tenants.

Then there is the new counter top , sink faucet , and tile back splash . 

:How important are garbage disposals for fully renovated apartments with fully renovated kitchens, granite counters, porcelain tile floors, dishwashers, pendant lights?

In that case I only pay for the title insurance covering the lender.I've dealt with many situations where the builder failed to pay suppliers and subcontractors leaving the buyer with liens on the property, sometimes in the hundreds of thousands of dollars.