The house is particularly appealing to me due to the low mortgage rate that he got in 2020.My question is whether I should buy his property "subject to" or add myself to the mortgage/deed.

For travel medical professionals I will accept a copy of their fully executed contract in lieu of pay stubs because their prior pay stubs may be totally different than their current contracted rate. 

I am simply asking to include something like, "unit has brought in rents well above market rate year over year" or "unit is cash flow positive". 

Money is cheap and a lot of people are advocating a lot of leverage. 

Orlando is a tough market, I think it would be very difficult to show any return at all right now with the high rates.

Unit A is about 100 years old and Unit B is almost completely new.Pros:-The duplex is in a very desirable neighborhood with home value appreciation year over year at about 50+%-Rent is also in high demand within this area-Cash flows well even with high interest rates and increasing property taxes-Home is price below average cost per sq ft-The house has been renovated and some parts of it has been remodeledCons:-All issues are with Unit A, the 100 year old unit.

That amount will have an effect on the premium for that portion of coverage of course, but shouldn’t raise rates on the rest of it. 

There is very strong appreciation over the last few years even with the high interest rates. 

The highest insurance rates in the country are in Florida right now, but I still like the state in general.

I have a few of my higher priced ones in my personal name because you can have up to 10 conventional in your personal name and they have typically have lower rates, so might as well save them for the bigger ones.The majority are in LLC's.