As the market improves, you might also have a chance to refinance and lower your payments.

There's a good chance the issue(s) you face has already been discussed and answered.Ask questions in the appropriate forum.

No chance.

There's a good chance the issue(s) you face has already been discussed and answered.Ask questions in the appropriate forum.

Either1) your startup takes off and you can distribute profit fast enough to pay off your debts, or2) you find another source of $100,000 a year (which barely even starts to pay down the $300k, but might provide a better chance for a better loan), or3) you BK and possibly lose the rental houses to creditors (hopefully not, but we don’t know how they are held), or 4) you sell the houses, take the tax hit, work with the IRS on a payment plan whose interest will be much lower than your CCs, and focus on the startup.  

There is a chance that investor is a securitized trust which will put your chances closer to zero of getting something done.

Had the chance to do this flip with a close friend that did not have to capital to take it on themselves.

No way I would trust this to chance.

It was mentioned above you could refinance into a conventional loan, however with the 5% down conventional primary residence loan on multifamily now chances are you won't refinance this FHA loan unless you plan on living there for an extended period of time and rates come down. 

There's a good chance the issue(s) you face has already been discussed and answered.Ask questions in the appropriate forum.