Hey Southside, I posted this in your thread on Business and Investing but I thought I would respond here as well. The majority of their smaller listings are all in the hill country area, hopefully this helps.
You may find something you're interested in from Ruple Properties, they sell farm & ranch land across the state and they have some available properties in the 10 acre range. They're owned by an Aggie and my wife, also an Aggie, works there as well.
If you have any questions feel free to DM me and I'll get you in contact with someone there.
https://www.southtexasranches.com/