Ska-rew that!
They should build the wall on the other side and annex the land from Mexico. If they don't like it, they can take it up with the USAF.
Let the border-front ranchers keep their land, and have the water. Mexico deserves to be punished for their part in our problem.
“Let the border-front ranchers keep their land, and have the water.”
In the past, they have been able to accommodate ranchers and farmers, by giving farmers codes to gates, that let them continue working fields on the South side, and building culverts to bring water in for ranchers.
Especially in the more built up or urban areas (like much of the Rio Grande Valley) though, I think they would prefer to button it up by owning the land outright, as a big observation/enforcement zone. This is a rare opportunity to get that done.