Here are Fannie's guidelines:Borrowers who purchased the subject property within the past six months (measured from the date on which the property was purchased to the disbursement date of the new mortgage loan) are eligible for a cash-out refinance if all of the following requirements are met.

I would likely need appraisals or some mechanism to measure value upon each buy in too. 

Value though is a subjective measurement.

What quality control measures do they have in place?

That said, there has been measurable progress and I can see this growing exponentially after I reduce my hours. 

I don't have a measurement on the windows, but they are probably 2.5' wide and 5' tall, and they are a single sliding window.  

When measured against income, DC is one of the most affordable major housing markets in the country, with housing trading at roughly 4-4.5 times the income.

My primary measure of return is MIRR.

Units have gone up a bit due to an increase in conservation measures but not by that much.

.), as well as any other measures that may be available to rectify this situation.