The opposition is not coming from the GOPe. Schummer is the one threatening to filibuster the whole spending bill if funding for the wall is included. He will fold IMO if the filibuster also cuts funding for Obamacare subsidies.
Paul Ryan and the other moderates couldn’t care less if a wall is built in San Diego, etc. They will fund it. It’s better than dealing with the bad PR if they oppose it.
This needs to be pondered: