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

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.

Are there any tax advantages or disadvantages to my being both a resident and a landlord?  

There are lots of helpful tools like a customizable pre-screening questionnaire, text/email interface to communicate with leads, and a database to keep leads organized.

One unit was rehabbed with $15,000 and a new leaseadded at market rent.

I searched within the BP website, but there were none listed, and a BP representative suggested I post in this forum! 

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

The house sits near a freeway junction and a busy street, and while my previous rental was also close to the freeway, something about this home's elevation makes the noise unbearablyintrusive.

I live in an apartment with 4 rental units and a studio.