I don't know about this.
What if he leaves in a year, to go play for the Lakers? He'd cost us a couple 1st's at least, that's a lot to give up for a player who might only stay one year.
Does he really want to "follow" in KG's footsteps with the Minny-to-Boston connection?
IDK, it's not as cut and dry as it might seem. I mean, including Sully, if you are going to trade for him, is a 'no-brainer', but I'm not sure I'd trade for him at all.
I'd want to talk to the player first, see where his mind is at about staying in Boston, long-term.