Also, if there is any way that you could get your name put on someone else's credit card who has good credit and is trustworthy like a parent during that six months, it would show that you are creditworthy because it would show on your credit report, even if you don't pay the bill.

In comments above the conversation around credit worthiness came up.  

You are pretty much in the top tier of credit worthiness already.

Just because someone has the money to lease and build-out a fancy corner building, does not mean they’ll operate a viable, creditworthy, business.

Again, whether or not both of you sign will depend both on the level of trust between you and the credit worthiness you guys are bringing to the table.

Both my partner and I work full-time jobs during the day, have excellent creditworthiness, and are willing to occupy one of the units in order to qualify for the FHA loan.

Credit worthiness of each partner. 7.

The buyer's credit worthiness plays a key role in financing: one of the various scoring models (FICo, Vantage, etc.), credit history, debt-to-income ratios, etc.

Your situation may differ and I would use all your same criteria (on all parties) and exercise extreme caution....if you are building a pool of applicants, the couple with no documented income would not likely be at the top for me (not sure what the the commission only single salary gig would be, but probably not a front runner in my pools or even meeting minimum criteria)....and you still have to even verify the third party payer would be credit worthy and even interested....

The first step my clients take is fill out a pre qual form, this will give us a snapshot of your business, and the credit worthiness of the applicant which will determine if you qualify for funding, and up to what amount.