Therefore your contract needs to adjusted accordingly. 

It works almost identical to a car loan.

Take a look and make adjustments.

I suspect they are using someone else's identity or hiding something negative from their landlord.It is not uncommon for people to have good credit but still have an eviction or other problems with a previous landlord.

In the next 5 years, we can buy one property per year with 25% down (~100K), and perform the same operation of using cash-flow for paying off properties next 15 years and we will have $15K/month net-profit which hits our goal adjusted for inflation (assumed at 3%).

In STR common markets like Gatlinburg this naturally adjusts itself as most homes are STRs so the entire market lifts to meet their cap rates, and they appraise on those cap rates in spirit, even if not technically. 

It might take some adjustments, but you’re not far off from making this work! 

The loan rate is about to adjust to 6.9% which is more than double what it currently is, making the property in the negative for monthly cash flow.   

It's advertised now at $1500, maybe another adjustment needs to be made. 

Feel free to adjust the numbers based on your expectations for capex or vacancy rates.