I would assume that the rent would be aligned with the same rules of loan modification which allows home owners a ,maximum monthly payment of the 1/3 of their income.I would also think that this solution is temporary.

Even if your credit sucks you can get non-recourse (no person guarantee, no credit check) at 7% (though lower LTV).Hard Money is temporary money.

•A period of temporary absence of up to two years for reasons of health, employment, and unforeseen circumstances.

I decided to try Airbnb when I was on a constant deployment and temporary duty cycle for work.

Now, my insurance is covering the costs to fix up the unit but apparently there is some law in San Francisco for temporary evictions due to construction that I have to pay my tenant $400 a day while I am fixing up the place!

Some people are doing very well networking with local realtors who focus on temporary placements for people relocating that want to test drive an area before buying.

They responded to me via email requesting to not have the wife's mother sign the lease agreement and that they are making other living arrangements for the mother so her stay is temporary.

Additionally you will have to migrate all of the information from the temporary solution to the permanent, which may not be a trivial task.  

There are typically two specific types: a Permanent Buy down, and a Temporary Buy down.a) In a Permanent Buy down, a sufficient amount of interest is prepaid to lower the rate permanently. b) In a Temporary Buydown, only a sufficient interest is paid to lower the payment for the first three years. 1) The reason to temporarily “buydown” a loan is to lower the current payments, thereby more easily qualifying for the loan.

That 0 is only temporary, but it's important to think of your profit / time unit so that you focus on what you're good at doing and outsource out things that take up your time that don't add a lot of value.