You should look at this deal from all angles. Inter are getting rid of a player who pissed all over them last season and they were pretty frustrated with him for a "huge price".
Mancini is the guy who insisted on balotelli and even if things worked out pretty well between him and Mario there is a big chance he won't last there for long (mancini that is) with all the demand from city owners. Whoever will take over won't be as patience with Balo as Mancini (after all he didn't sign him).
If someone like Mourinho couldn't handle him (i don't buy this whole

inter's environment

didn't help him argument), don't think many managers out there can.
Like i've said on the other Thread, last season they've sold Zlatan for a ridiculous price and they've signed players who won them the triple. This year they're getting rid of a trouble maker for almost 30 mil ( yet another smart business ).