Of course we want a wall.
Stopping illegal immigration by setting up a temporary fence of concertina wire, manned by the National guard, is a temporary measure.
What this will do is change the facts on the ground. Once there is no longer any illegal crossing, the political problem of building the wall is greatly simplified.
One approach might to be to set the concertina wire 40 feet inside the border, coast to coast. Then the wall can be added on top of the border at a later date, once all crossings have been stopped. The space between can become the patrol road.
This does not have to be a complicated, drawn out process. We can do something about the border wall right away, and we should.