I would certainly stress to you to fly into San Antonio and tour the multifamily market before pulling the trigger.  

The most important thing to do in today's market is be sure you have a solid virtual tour of your property.

We told only 5 people (out of over 50+ inquires and 20 house tours) to fill out the application and they are all qualified.

I would be looking at properties remotely, and getting help from my family to be my "feet on the ground" to tour properties. 

and:I am available to tour:

I have taken a tour this weekend just to get the feel of it.

You could also do a virtual tour or 3D tour and market it with that: then do offers contingent on inspection and then set a date and time for maybe 3 of the best buyers to do their inspections (let everyone know what you are doing) : you as in the Realtor helping you sell.

With this (awful) approach of pretty much just listing a house on these sites....and hoping for the best, my prediction is you would get pretty much slaughtered in the reviews, which would lead to less bookings, and then eventually reaching the conclusion that STRs don't work.To do it with a better degree of success you would want to purchase the property, put in all the finishing touches that guests want to see such as books about the area, maps, buy new furniture and decor if needed, create a welcome book with recommendations on restaurants and attractions, list it on multiple sites, build your own website/brand, promote it on social media platforms, have professional pictures taken, have your listing completely filled out, be incredibly responsive to every question and message you receive, build a really good guidebook to the point where you are almost an ambassador/tour guide for the area, interview and contract with professional cleaners and have backup cleaners in place, have a relationship with a professional handyperson so they know who you are when you call the first time requesting their service, have several electrical and plumbing contractors identified to call when problems come up, set expectations for your cleaners up front and provide feedback immediately to them when guests have a complaint, and handle all complaints with your guests the way you would want it handled if you were the guest...put the guest first before any profit/money. 

Also, the PGA Headquarters are also relocating  to Frisco over the next three years.  

I do know that the new PGA headquarters is being built there so that will bring lots of high-profile golf courses with it.