Persons over 65 account for ~14.3% of the population.

They take into account the tenant's income, other housing costs like utility bills and market rent for the area. 

She also told me that the owner is from Mexico, he does not report everything and is earning more income than reported.  

Investment Strategy:Buy and HoldInvesting herebecause: Potential to Appreciate in Long Term (10yrs+), want to build NetWorth, Affordable in my budgetYear 1 Evaluation: Gross Monthly Rental Income = $2,042.50 Monthly Cashflow = -$76.05 GRM = 12.79 Cap Rate = 5.12% CoC ROI = -1.11%Hoping that theinterest rates go down so that the monthly cashflow becomes +ve.

Unless there is at least 1,000 SF of flooring installed, $4,406 is too much for materials (accounting for 15% waste and underlayment which are both factored into my analysis).

As Joe mentioned, you are paying the interest back into your TSP account, so you aren't "losing" money by paying interest which is very nice. 

One month or one decade selling a flip is an active business like selling hamburgers, and pays regular income taxes not capital gains.

The tricky one is the rent to income ratio and how it is related to the median family income.I did note that at lease one other poster was advised to always use the low barrier screening criteria to avoid potential lawsuits. 

If I have to pay taxes on my income, SO DO THEY!

When adding the rental income for Unit 2, it asked for % sq.ft. rented out.