Most likely once you cut open a hole in your sheetrock you will se the 2x4 wall framing, and more sheetrock, which should be doubled 5/8" fire rated sheet rock.  

I've looked in Tampa (Hyde Park, Tampa Heights, Seminole Heights) and Pinellas county (Clearwater beach, Indian Rocks, Lealman, St.

On the beach side there has been recent development with a Jimmy Buffet retirement community and the Hard Rock soon to open.

One person's rock, is another person's diamond.

Their auto-categorization is also rock-solid. 

For example we write exclusive use of the rental property includes use on two sides to the tree line, on one side to the rock wall and to the front curb. 

The RE market around the country is built to succeed, especially in the Rock County, Wisconsin market.

That's just my $.02 but I'm sure others have been operating differently with success.As for neighborhoods, West Side, South Buffalo, Kaisertown, decent sections of Black Rock and Riverside, pockets of North Buffalo, maybe some sections of Cheektowaga are going to fall into those categories.

I would work with a rock solid STR agent in San Antonio to see what places are less strict as I know they have been cracking down.

A smaller group that understood these systemic risks and plowed forward anyway, knowing somewhere inside that they were likely duping a lot of supposedly sophisticated investors, capitalizing on the latest "pet rock" frenzy.