You get 1 vacant out of 20 units and you're still fine even if you have a 75% Loan to Value mortgage.

Some of the other fellas input is fine, but in my worst years, I've done 10X better than 1.75 or even 5% overall if I had to pull when it was down.

I forget off-hand which one it is, but in the fine print of the appraisal report there is a certification that states the appraiser had adequate data to develop a credible opinion of value - clearly they don't and should have withdrawn from the assignment.They don't have enough comps.

I have total strangers living together in my properties and it works just fine.

The attorneys will try to tell you differently but just keep the proper insurance and treat tenants the right way, and you'll be fine. 

Also, when you inquire about this, there is also a chance that the brothers never got a permit for the changes, (new kitchen, bathroom ...etc), so it could backfire on them as well as the town might want to investigate and hit them with a fine for not getting a permit.

So, if you want to test renting and see what Amazon impact is over the next few years, that is fine but you need to really think things through about 2 1/2 years from now. 

Then you’re profit is cut down to nothing and you have someone that can fine you, and HOA’s in Florida have  Foreclosure authority. 

You're essentially signing up to be a landlord, so your due diligence will be crucial.If you're indeed using this as a house hack, then I agree that 2% for capex and repairs are totally fine since this property was built in 2016. 

So long as the company who did the work is licensed and insured, offers the warranty transferable to you and it passed city inspection, that is fine.