I'm pretty sure that Ray's at the point in his career where if he doesn't feel like going somewhere, he just stays home.
I'd also say that, after the trade rumors when he was in his expiring contract year, the player option is a bit of protection for him against being traded to a rebuilding team for a young hotshot (which is what we're talking about here).
So I don't think it's about the money for Ray right now. I don't think he'd go to Denver, and I don't think he wants to be on any other contender except Boston. So Danny would have to go and sit at Ray's kitchen table with Ray and his family (Mom included) and lay out the idea, and would have to get assurance from DEN that they need $3 million to buy out the rest of Ray's season this year, and assurance from Ray that, if bought out, he would come back to Boston.
With that in place, I'd say it's a risk worth taking.