One thing they didn't mention here that I really like, or mention anywhere afaik, admittedly perhaps because it isn't true, but I think probably is true, is that this wall will be very cheap and easy to repair when the cartels, human smugglers, etc., do damage to it trying to get through.
Explosives, ramming it with a tank, etc., doesn't matter. Rush in, replace a few bollards or even an entire panel of them, allow the concrete to dry and, BOOM, good as new - elapsed time 24 hours.
“this wall will be very cheap and easy to repair”
It has already been proven in practice.
We have had bollards in some high traffic areas (like Nogales) for about two decades already.
Operations and Maintenance costs are quite low. Breaches (cutting or breaking through) are rare - basically just when the bollards are not under observation, and breachers can set up shop to work on them for a long time, with sparks flying like a fireworks show.
The new wall system is wired with alarms and sensors, and is under persistent surveillance by cameras that are monitored by operators in command centers, as well as by AI software, which will cue the operators, and slew the cameras in on suspicious things it recognizes, like people, ladders, or heat events like sparks from saws.
If the bollards are guarded and monitored, there is essentially no maintenance cost for them; just the roads, lights cameras and such.