https://www.google.com/maps/place/Texas/@32.4826637,-98.4527...
Some youtube video show packets traveling a few miles on a stupid esp8266 chip. I don't know how sparse texas is, but I'm sure you can find a nice % of houses whose distance to each others is lower than 1mile.
I had about a decade of wireless ISP in a neighborhood. It was ok, but speeds suffered as the number of users increased. BTW, this city of 30,000 doesn't have cable and it didn't really get started until 1999. Cable companies didn't want to build it out.
Now I'm in the middle of nowhere and there isn't a WISP to be found. Houses are to far apart and there are too many trees. Noise? I don't have any of that, but line of sight doesn't exist.
I think getting a workable mesh going anywhere would be tough, there is always something.
detroit diy wifi community network