I don’t doubt for a minute that there are enough votes in both the House and the Senate to pass a reasonable stand-alone legislative solution to DACA. That would require Ryan and McConnell to rely primarily on Democratic votes, just as they always do when it is time to keep the government open and raise the debt ceiling.
Immigration divides the GOP like no other issue. If the Reactionaries were to go off and create their own party, it would probably be in response to immigration legislation. And so, if you’re waiting for the Republican leadership to do the right thing and permit a vote on DACA legislation, you could be waiting a long, long time.