I do not think Michael would accept such a proposal, but it would be interesting for him to articulate reasons for refusing it.
This has already been proposed and rejected by Michael R. Schiavo. He wants "the bitch" dead; what is it about this that people cannot "understand"?
Reread that proposal; I think you may have missed something. If Terri's condition were indeed as dire as Michael claims, that proposal would result in her dying a lot sooner than Michael's current course of action. I wasn't aware of anything resembling that specific proposal (including the prohibition of tube feeding) having been offered to Michael, but if there had been I'd be curious what his specific objections would have been.