I've posted several links early in the thread, which demonstrate the relative social service costs vs. a wall. The wall would be very very cheap, even at high estimates.
I agree with you.
I support the wall.
Ship all the illegals down there, have them build the wall, then put them on the other side and pay them to dig a moat - two problems solved.
But we'll never do it.
Americans have bencome woman-hearted.