I don't think it's wise to try this until you have proven experience and a solid partnership agreement.It's OK to scale slowly.

Everyone has their own room and a bathroom and they share common space such as living room, dining room and a kitchen and they are one the same lease.

Quote from @Polat Caglayan: 1500 sq ft and a mid-level renovation that complies with section 8 standards I would get a contractor out there 

They have companies that will write them for you with a pen and a computer.  

He just hosted a get-together - a Family Reunion - where we took a deep dive into various aspects of BRRRR, how to source deals and a look at how he is rehabbing the hotel we were at that he owns.

Due to the popularity and scarcity of these properties in Nashville, it would be difficult to find a property meeting the STR requirements given a proposed purchase price of ~$300-350k.Additionally, your situation is a bit unique as it sounds like you may be living away from your primary residence more often than not, and as such, I also recommend you confirm with a lender whether this situation would qualify for this type of (primary residence) loan.

I am a newer investor and a Realtor in DFW Texas.

This one is a big improvement because we'll gain a lot of space, a more "house-like" layout, and a garage, and a third bedroom!

As a landlord, Zillow provides you with a background check, credit score, and a well-formatted application for each applicant.

Good cost basis on the land and a strong ground game to complete.