...wouldn’t get built.
1) The amount of private land along the border would create endless court disputes for years that would prevent construction
2) The terrain/river make it impossible to a wall in some areas.
3) The NEVER ENDING cost to maintain the wall would need to be figured out. It would cost close to a billion per year just to maintain this useless barrier that wouldn’t stop most border jumpers.
Tell you what? Before blathering any longer, why don't you remove the locks from your doors, your car and any other thing you have locked up? Then, you can commence to tear down any walls that p;rotects you and your property.