I think you've been ignoring what I've been saying. We need to work with our neighbor nations and their governments to address why they're coming here, hold those nations accountable, and ensure there is a clear immigration system for those who want to come here for a better life, not criminals. Your suggestions will lead to only gangs coming across the border through even more unseen methods.
We can start with Mexico. They're basically a bridge. Maybe we can work with them and offer them support in cleaning the cartel out, or even those Central American nations with those issues. That'll reduce it by more substantial numbers at a lower cost than a wall and its maintenance will.