Been going back and forth with my brother, who's pessimistic about our chances, about this and this is the gist of what I said:
Outside of OKC and Washington, Durant is going to be looking for money, market and surrounding talent in some order. We have all three. We should have plenty of cap space that summer. Market-wise we're not on the level of LAL (no surrounding talent), NYK (if they have the space to sign him that probably means they suck, if they have the surrounding talent to entice him that probably means they have no space) or Chicago (unlikely to have cap space), but I don't see why Boston is not only the level of Miami, Golden State, Brooklyn (bigger city but it's owned by the Knicks), Dallas or Houston. The Red Sox and Pats are constantly disproving this theory that Boston isn't an FA destination and IIRC KG had to pull some strings in order to come here. The problem has been the rarity of the Celtics having major cap space whenever one of these talents reaches the free agent market.
As for surrounding talent, we've got Smart, Young, Sully, Oly, and Bradley, plus whatever we figure to get for Rondo and Green. Laugh at the inclusion of Sully, Oly and Bradley but that five-man squad is already a heck of a lot more than LAL and Brooklyn figure to have when they make an offer to Durant. Then we have another lotto pick coming this year (getting Okafor or Towns would really help in landing Durant) and three Brooklyn picks, all of which have serious lotto potential.
It would be foolish to say that this story really means anything. But on the subject of Durant's attraction to Boston, I don't see why it's outrageous to suggest that we'll be a competitive suitor right behind OKC and Washington. We'll have a lot of money, a second tier market, good surrounding talent, a championship history and a respected front office. We also seem to have a coach that players love.
Smart, Young, Durant, Sully, Okafor with Bradley + 2015 LAC 1st/2016 CLE 1st/2016/'18 BOS 1st/2016/'18 BKN 1st/2017 better of BOS/BKN 1sts/return for Rondo + Green to round out the bench. Whew.
OK, I'm done rationalizing this crazy dream.