I think the only way for turnkey to survive is for them to up their game significantly and decrease the profit they take on the rehabs.

This is great, so just in case for some reason the student population decreases, you can always turn it back into a regular long-term rental property.

As of now my formula is to decrease my living expenses, build up a reserve for vacancies, cap ex and some miscellaneous funds.

Sure $1700 to $1500 is only a 12% decrease which doesn't sound like much but what is the difference in your cash flow.

Also, your interest you pay changes every month since your loan balance decreases every month. 

For higher credit scores it needs 4 established credit lines for 7 years or more.Low limits decrease the score, however, applying to increase it get you hard inquiry and equal to opening new card - minus 5 points,Not all cards are the same - don't apply on store credit cards or unknown something.

If I budgeted 5% for each of those areas (probably a little low) then my CoC would decrease to 5%. 

These lenders can consolidate your mortgages under one umbrella mortgage to allow for greater flexibility and decrease in administrative costs.

This will (A) decrease your credit utilization and (B) should make your credit score go up over a period of time. 

So the holding costs were listed in the calculator, but is that something that just decreases the ROI percentage?