It's not "racist crap" - I will get you and nicmarlo the link. Perhaps you missed where it would cost $80 billion, let alone what "sealing off the border" would mean to the rest of our economy?
"it would cost $80 billion"
Oh come now, who is smoking the wacky weed here. Even an intermittent fence would slow things down.
And you have yet to show how any illegal would be jack stupid enough to sign up for a guest worker card only to be taxed, finger printed, regulated, subject to minimum wage, located, subject to fines and spindled, folded and mutilated.
So, your solution is no solution, just unlimited Reconquista. Start with the FENCE, then employer sanctions for not following existing wage and tax and OHSHA laws.