and can supposedly be built for $10B? I don't think those numbers add up.
The US Mexican Border is 1989 miles. That equates to 10,501,920 feet.
If Mexico kicks in $10B, that will equate to $952.21 allocated per foot of wall.
There's absolutely no freaking way you can build a wall anywhere from 30 feet to 65 feet high, made out of concrete, over 1989 miles of terrain, at less than $1000 per linear foot.
It is an absurd, ridiculous fantasy, and anyone who believes it should simply be ashamed of themselves.
https://www.washingtonpost.com/news/the-fix/wp/2016/02/26/so-how-high-will-donald-trumps-wall-be-an-investigation/