On top of that these markets have done very well in terms of appreciating in the last 5 year (See Memphis 50% increase, See Detroit 100% increase).

If the constant turn-over bothers you, but you like the idea of rental income - maybe the long term rental is the way to go.  

If you intended to keep them long-term, it doesn't really matter what their market value is right now.

And it's good that you can always return to long-term or mid-term rentals if need be. 

Newbie here - 2 weeks into my first property, I plan to house hack short-term rental (live in basement, rent main house) in Nashville.

Hi BP Community, I have a few long-term rental units, but am thinking about transitioning into the more lucrative space of STR.  

Seeking stable, long-term housing can lead to longer tenancies and lower turnover costs, which is what many Section 8 renters are after.There are, however, disadvantages to take into account.

I currently have 2 long term rentals, looking to add more cashflows.

You and your cleaner should form a type of business relationship that will last long-term, which benefits the both of you.

In terms of advice, it seems like you have a solid plan of what you're looking for so I'm not sure what else I can add other than I think it's a great idea.