I can't remember from when I was in FL re: rent and who normally paid, but in my opinion it raises the financial caliber of your potential tenants.

Remember, they're the lender, not you. 

If I remember correctly, somewhere in the 6 percent range?

Remember, investors invest in you not so much the deal.

Remember if you are borrowing money for a DP the margins on the property need to be much higher than your normal investment property.

It's been a number of years, so I don't remember how much but it felt like a lot in college.Lease: have one... month-to-month is my recommendation in case the living arrangements just aren't a mutual fit.

Remember that the IRS is really busy right now but they have the right to audit depreciation schedules and studies for as long as you own the property plus 3 years.

Remember, the motivation for the cousin here isn't to stay in the house, it is that he wants MONEY, a major driver for this kind of behaviour, out of the deal. 

This is not a common loan, and essentially allows you to use equity in that paid off home and repay it over the course of 20 years (if I remember correctly) and then it locks into a fully amortizing mortgage.  

I will take a closer look once i get the chance but don’t remember seeing that on the inspection report