A. Sully is not high risk. kid is having his best year to date. if you're worried about health, that's moderate at best and even then it's stretching it.
You like Sullinger. Good for you. That doesn't change the fact that's he's a poorly conditioned player with a history of back and foot problems who's a RFA repped by David Falk, who is "excited" for him to be a FA this summer.
~ He could get (more) injured any day and be worthless on the trade market
~ He could play well and demand a huge contract, which the Cs shouldn't give him, but might to risk losing him for nothing
~ He could sign that contract, get hurt again, and be dead weight (no pun intended)
~ Mostly likely, he could refuse to sign a fair market deal with the Cs and play for the QO next year with the intention of being a UFA the following summer (ala Greg Monroe), which will again render him worthless on the trade market next year
He's not exactly a guy you can bank on, so you can bet you'll hear his name in trade rumors between now and Feb.
b. by Buy-in, I'm talking about him coming in and making an effort to play hard. Not looking for a commitment past this year. we seem to be talking 2 different things
Oh, you want Ainge to call Dwight up and ask him: "Promise you'll play hard if we trade for you?"

c. reword any way you like, that's still a pittance for Howard. houston would need more back
It's not rewording -- it's understanding the proposed deal. You talked about Lee -- he's just cap filler.
Meanwhile, Netting a legit NBA forward locked into a below market deal (Morris, who they want), and 2 picks while shedding Brewer is probably the best they'll do for a Howard rental. If you don't believe me, try finding a better deal in the trade checker and lemme know.
And please don't put out this "Deng, Andersen, Winslow and Whiteside" nonsense I keep seeing, just because Chris Sheridan tossed that out there a couple of weeks ago.