You know, I have a solution that is better than building a wall.................
Every 50 miles of border, build a barracks that is capable of housing at least 10 people. Those are the people who are on watch for 3 days to a week at a time, when they are rotated out for 3 days to a week while another rotation takes over.
Those are the people who respond to border breaches. And, because they are only 50 miles apart, the response will only be 25 miles on either side.
To find out when and who is coming over the border? Simple...........put those recently discharged veterans who have experience with drones to work and have recon drones patrolling the sky above the border. Not only can they see just about anything during the day, but they also have infrared for seeing things at night.
Would be a hell of a lot cheaper, as well as a whole lot more secure than just a simple wall. Less impact on the environment as well.
Most of those coming from the south are coming for a job.
Employers are breaking the law when they hire an undocumented worker. So far we don't see any employers being prosecuted or even held responsible for their crimes.
Change mandatory sentencing laws for employers who hire undocumented workers. Require at least a decade in prison and fines that bankrupt the company.
I guarantee that no employer will hire an undocumented worker.
If there's no job here for them, they won't come.
That's much less expensive than all of the so called solutions that have been tossed around.
It will also succeed.