If one person stops paying and it's tolerated, It's more likely to spread within the house.

If it cash flows solid after detailed UW and it feels good, go for it.

The only PITIA paid from personal account is for a personal residence.

For example, they can finance up to 70% of the ARV meaning, if you have a perfect 70% deal (purchase price and rehab are withing 70%) they will cover those cost for you.you will still incur closing cost, taxes, and insurance cost though for example.True 100% financing (ZERO out of pocket) typically requires solid relationships with private lenders or a combination of hard money lender and private lenders.

I personally don’t want to use FHA. 

Q3: My personal rentals have not, but I bought in Lawton, OK because that was my duty station.

The person you mentioned has no formal credit background.

Build a home and then purchase that product with a personal conventional or FHA loan? 

My personal return is fairly complicated with Trusts, partnerships, W-2s, and several K1s.

(But don't even think of doing this one without getting proper training and solid paperwork!)