Aside from verification of existing license status in the state of operation, what other means do you advise a GC be vetted before signing a contract for work? 

We are closing a deal in Dayton, Ohio in 2 weeks and contractually are obligated to allow the existing tenants to continue occupancy for at least 60 days. 

Ideally you also took photos before they moved in to avoid them claiming the damage was pre-existing. 

I familiar with the process but how would it differ from a regular BRRR on an existing property?

Based on the information you provided you may be able to squeeze in a 2nd ADU due to it being an existing multi-family address.

Do you think it could be in that area of Mexico it does not exist a home inspector as a profesion? 

The best thing would be to buy an existing 4-unit with an FHA loan.

Common fees will include a set-up fee, leasing fee for each turnover or a lease renewal fee, marking up maintenance, retaining late fees, and more.

With a jumbo loan I will be able to retain $80,000 for future investments and help with the down payment of my next cabin.If I went the conventional loan route, would I be able to cash out refinance at closing or would I have to wait 6 months? 

I wish people would use the search function because this exact question is asked several times a day.The existing contract transfers with the sale and you cannot change the terms of that contract.