@Daniel Green some good suggestions and really high performers on this thread, you are in good hands. 

Usually the numbers don't work to build in these neighborhoods, unless government tax credits, etc.Do you see the problem with your two statements:"The turnover costs could/will be high"and"How much more damage could they do?"

20% is not high for managing a STR.

The behemoth cabins in the Smokies are super cool, but other than high season, it's mostly weekends.

I highly recommend an attorney to draw one up as each state and each property can have unique issues. 

If you live in a high cost of living area, investing in more affordable out-of-state markets can be a great strategy.

I think it is fair to say that there is somewhat of a tradeoff between markets that provide positive cash flow on day one and relatively high appreciation-based markets.

If anyone tells you that you can get 15% cash-on-cash it's either a scam or ultra high risk. 

I have 3 per property and find that to be the best way for me to take advantage of their high APY and also keep things super organized.

Honestly with an interest rate like that you could even not pay off your primary and put any excess capital in a high yields savings account and be financially further in the long term.