I don't think it's likely that we get him, but I'd be more than willing to throw pretty much anyone not named Smart (and possibly Young) to Sacramento plus three picks to get him.
I'd pull the trigger on something like Sully, Bass, Thornton, Bos 2015 1st, Brk 2016 1st, and 2016 Cleveland 1st for Cousins. That's a pretty good prospect in Sully they'd get along with 14 million in expiring contracts and two pretty dang good picks and a mediocre pick. Now whether or not they'd do it is doubtful unless Cousins really demands out, and he'd probably have to want to come here.
But getting Cousins knocks 3 years off of the rebuild easily, and his presence makes us MUCH more attractive to free agents, especially some of the forwards coming up in the next couple of years looking for a legit two-way sidekick at center, i.e. Love, Aldridge, Durant, etc.