One thing about The Wall, it is of such construction that demolition would be hopelessly expensive, and most of it will remain standing several years from now. Rather than take down the wall, removal of monitoring systems and daily patrols will most likely result in either a number of tunnels burrowing beneath, or of means to climb over the wall with climbing fixtures put in place by daring and ingenious scofflaws on both sides of the border. Simply flinging a cable up over the top, and attaching various fixtures so it may be climbed and descended from like a cliff, might be one of the workarounds that provide access without passing through a legal entry point somewhere.
The coyotes are hungry.
Easier to just remove all CBP at the ports of entry - just let the traffic flow freely. Drugs, trafficked people, 7 billion illegals, contraband - all just pass into the US unchecked is so much easier to do and costs less.