Pardon my questions, but I am confused by the math. 

There are tons of caveats with residential and commercial so do your homework

You need to do some homework here and work backwards.

Do your homework.

Sounds like you got a pretty good deal going on right now and your able to make quite an income with your current job with minimal monthly expenses i presume so a mortgage payment that you can afford (do the math beforehand ) wouldn't be the end of the world for your income  especially if you had BOTH places rented out.

Then look up the relatives and do the math to likely find the daughter, by age. 

If you do your homework, you can find great content or even a few mentors on this platform. 

Hi @Brant Richardson - here's how the math breaks down ... and I'm assuming that you're adding $X to the first loan and then once it's paid off you're adding the PI from loan 1 and $X to the loan 2 payments...Assume you have 2 loans with different rates (balance doesn't matter) ... paying off the higher interest rate first allows you to pay them both off fastest.Assume you have 2 loans with the same rate but different balances ... it doesn't matter which one you pay off first, it'll take the same amount of time to pay them both off.If I were you, I'd order them by the interest rate, start with the highest one first and then just work my way down the list.

If one comes in at 700k and one at 600k, Im sure everyone can do the math.

The condo is not the most valuable property I own, the duplex is pretty far down the list.I'm mentioning these numbers because they're important to my perspective on this topic -- housing is often extremely cheap in my area, and the math really never works out right for renting.But even if I were in your shoes, I would live in the cheapest possible shack I could find to own if I were you, anything that would make the homeownership math work, in preference to any sort of nicer property that I would rent.