I re-posted an updated version of this question here:https://www.biggerpockets.com/forums/88/topics/421...

He as 45 days after close to identify potential replacements and 180 days after close to complete his purchase.Where you can score some good will points is to keep your offer where you want it but agree to his 1031 contingency.  

The higher the credit score, the higher the resale value of the mortgage note.Hire a servicing company to collect payments and do all IRS paperwork.  

No, but in the 9 community property states (California is one, I have no idea about SC), we must consider the spouse's credit report debts even if we do not consider her FICO score or income. 

This is a simplified version of this answer, but you make money by the difference of what you pay in interest (as well as other expenses) and what you make from rent.

-If above requirements are not met; Apartment can still be rented with a lease Co-Signer that has a Credit score of 680 or higher.

Always, always, always do a credit check, and look at the report not just the score.

then u would have to refinance it into your own name/loan.or you could OPM by getting a loan from a rich person straight upfor an FHA loan-  if you have usually above a 620+ credit score, they will calculate your income based on the last 2-3 years of your W2s to see if you make enough to afford it.  

I paid a little $175k for the location, but my mortgage is $1300(FHA 5% down- and I used a Cincinnati Port Authority Grant that paid all of my downpayment, all I needed was closing costs $3800- requires credit score of 680+ i believe and there are income barriers, but if you fit into that criteria, check it out-I used NRL Lending) and the 2nd Unit(4-2) rents for $1500, and my unit rents for $800 when I find my next house hack... so there are deals to be had.

If your plan to improve your credit score involves finding new ways to get into debt, I would avoid that altogether.