I read that one of the requirements for getting your second FHA loan is having a change in family size.

Can you be financially free, sure, consider if you are buying real estate you will no longer have stable income to get a loan.

The interest rate on a HELOC or Heloan may be better than the personal loan. 

Sometimes even calling them as soon as I saw the inquiry.

I am responding as a consumer not a STR owner we had one its lasted for us for exactly one tenant then we felt it was too much work for the return  on investment we do much better loaning money and buidling new homes than to worry about people goofing up our homes :)I do have some MTR you know fully furnished homes in Vegas and those are money makers for us top of the line tneants paying double the going rate for rent.

The sale failed and he still owns it.One of the potential solutions is to use an SBA 504 loan for the real estate. 

Kieran, the best bet here is to refinance with a DSCR loan.

If it is someone you know you can give them a straight return as if its a loan - can provide a lower interest rate to provide upside - it really depends on the lender and what are they concerned with and what is their risk profile. 

Fannie/Freddie (Conventional) loans aren't just about rate and transfer taxes. 

Pay Down the Loan Faster:I’m considering applying $40,000 annually to the loan principal.