They’d have to get across they rio grande stocked with big gators, over an electric fence and a deadfall, then past the anti personnel minefield if that was my property.
I've said on many occasions that we don't need a wall (or a minefield, etc....).
All we need is a short handful of sniper teams, each armed with a Barrett 50 cal. Reposition them randomly.
Wouldn't fix the problem immediately, but either illegals would lose their nerve, or we'd run out of border-jumpers. Either would be ok by me.