simplest answer to your issue...You can know every statistic, fancy book terminology, whatever CORC, CCO, OKREL, f, etc, means, but...that isn't worth anything if you arn't cashing checks every month from it.

The simplest answer is to calculate what your additional interest expense will be due to the refinance (say an additional expense of $3,000 per year), and compare it to what your annual return will be from what you do with the money.

CoCR is the easiest, simplest, REI analysis there is.Cash, only cash, no cash substitutes, for the first year only.               

Seems like the "simplest" option (though costly in terms of realtor fees/repairs, etc)Any other options?

@Peter Kim Think of it in the simplest of terms that you are selling the house to YOURSELF.

Also, get the simplest (more features just means more to break) and sturdiest appliances you can find. 

Ask your accountant the best and simplest way based on your goals. 

In the simplest form, you can look at long term historical pricing to see if/how long/how steady the history of price and rent appreciation is ... there WILL be some fluctuation as RE is somewhat cyclical and nothing ever goes up in a straight line always, but does the neighborhood and surrounding neighborhoods have a long term track record, spanning several up/down cycles of appreciation and rent increase?

@James Letchford, the simplest structure would be for the investor to simply make you a loan in exchange for interest payments.

I simplified the situation to the simplest component.