My dude are you seriously playing dumb about these things? Use your googles. Or just read our conversation back. I posted a breakdown of Bernie's funding plan (namely a payroll tax) vs Warren's TWICE. You were quoted in it dipshyt. His version is the one actual wonks would suggest. I also posted a link to a white paper with multiple funding options included. That was during this back and forth.
The implementation is a four year roll out, during which out of pocket costs are reduced and the age for enrollment is decreased gradually. Bernie's not even the only one to have explained this, I think even Gillebrand did during one of the first two debates. Pay attention.
Legislative mechanisms it the only standing challenge and like I said, useful idiots like you are the problem on this end for pretending your legislators wouldn't change their tune entirely if they had to worry about their seats on a no-vote. And I call you a useful idiot, because you don't bother to read his plans but dismiss them. You make it so much easier than it should be for Pete Buttigeig to peel off votes from Warren then blame Sanders for it. It's own goal inception.
P.S. That part of M4A nobody's talking about in Warren's bill from your post above...Bernie and Ro Khana proposed the same concept in a bill. You'd really like his plans if they weren't his.