I just saw this report from today (http://www.theolympian.com/news/business/article179842706.html):
“Trump has asked Congress for $1.6 billion to replace 14 miles of wall (22.4 kilometers) in San Diego and build 60 miles (96 kilometers) in Texas’ Rio Grande Valley, the busiest corridor for illegal crossings.”
That would be 74 miles at around $21 Billion per mile - very robust infrastructure and/or very high acquisition costs.
I”m curious as to how the Texas stuff will come down. It is going to be different
than the western states due to the meandering of the border along the Rio Grande.