I doubt Ainge wants him. I mean, you hear Ainge in rumors about Butler, and guys like Noel, and he even seems to acknowledge having these discussions (even if they are preliminary).
But have you heard Ainge in many Cousins rumors? Rarely, and the only time he touches upon Cousins he usually gives negative feedback, like "we don't need locker room cancers" or "from a distance, looks like Cousins has a lot of problems...". He doesn't always explicitly say "Cousins this.." or "Cousins that..", but he definitely seems to imply it.
If this is the case, we might all just be wasting our time hoping for Boogie and Boogie rumors

(and I'll admit, I would love him here too). We might find out we are wasting our time on Jimmy Butler as well if the Bulls keep winning now.