Much better than digging a hole in the ground or buying up property along the border.
As far as the border property, I wish more people of consequential power/capital would follow their lead and buy up border property. The wall is preposterous and any form of resistance is credible in my eyes.
Why? This site is obviously biased, but it presents a case for the wall saving us money: https://cis.org/Report/Cost-Border-Wall-vs-Cost-Illegal-Immi...
I'd rather spend money on dumb, long-term tech like that instead of our ridiculous military budget.
The wall was certainly a success for San Diego: https://www.youtube.com/watch?v=sxhhjfiSy2Y