All sorts of things might be different for us.I'm saying all of this because if a newer home helps your marriage - what's that worth?  

Plus, hes kind of extended family by marriage, didnt find that out until after the fact, but I do feel that if I can help in some way make this go smoother for him/them, then I should.

(They are having marriage problems, and they are't too bright either) Anyway, I tried to explain that they need to pay the rent, and I was told to go to hell in a few words.

My wife and I spent the first 6 years of our marriage in a duplex that we owned, renting out the lower unit while we lived in the upper unit.

Although you may be on the same page when you start out, so many other things can happen down the road including not only disagreements but divorces, marriages, financial problems, moving to a different state, etc. 

I ceased this practice in 2013 due to marriage.

Marriage (expanding family) is one of the exceptions i found that allows you to move out of a FHA financed building before one year.

Ideally, I'd love to sell it to her (and save the real estate commissions for agents), but she is still trying to fix her credit (from her bankruptcy in her previous marriage and existing student loans) to be able to get a mortgage.

My great aunt (by marriage) has been paying the senior tax rate for about 3-4 years now, despite being dead.

We doubled our living space (we rented an apartment for our first year of marriage) at a third of the cost.