Without an atlas or geography guide in front of me here, I'm guessing to a great degree but if memory serves Del Rio is about right on the border with Meh-ico and that nothing for miles and miles but miles and miles is about all the early warning y'all about to get before the next wave of illegal immigrants comes a-wandering on by. That's about as West by god Texas as anyone would wish to be.
So, since I hate to have to guess, I went and dug out my Norte Americano Road Atlas and sure enough, west of San Antonio on US90 lies the border city of Del Rio. And across the federal border lies Ciudad Acuna, or Acuna City if you prefer, with a US/Mexico border zone located in between the two.
All of which might tend to explain why that oh-so-choice piece of land lies unsold and unloved. Not sure you could grow much on it except tumbleweeds. And equally sure that if you did buy it your first visitors would be representatives from the Alphabet Soup gang of Bureaucrats wanting to know why and generally being pushy about learning ALL about your intentions. That and wanting or demanding permission to take regular seismographic readings to make sure no one is tunneling underneath..................(Are you sure that you aren't a holding company that has bought this land for illegal and nefarious purposes???????
Nope, not me, not happening. Besides, Hurricane Beryl is about to pay the area a leetle visit in the next few days and being flat and empty is something of a bonus when a hurricane comes calling; nothing to knock over or blow away.
Nick