The 1st one is stupid as we need a WC defender to replace him and we can`t sign a WC defender for less or the same amount of money we will get for him
The 2nd You can say whatever you want about him but in terms of skills ability and potential he is great too bad he lets his dumb personality ruin his career. The only reason for not wanting Balotelli here is his personality as he is clearly a great player
About the first thing I would say its doubtful at best. We need to figure out how much are they offering for Chiellini. If he is seen as the vital ingredient in a CL winning Real Madrid or EPL winning City then the price we could get for him might be astronomical indeed. He signed a new contract last year i think, so if somebody wants to move him he would have to put a lot of leverage. If we get a bid in the 50 mils range from anyone, I would consider it, especially if we can get Sakho for 20-25 of those.
About Balotelli - there isn't a better suited player for Marotta's prove-yourself system. He will be loaned - if he is a burden in any way he would get back to City before he could say 'racism', if he adapts to the team, earns a place and respect - he would be the last one that wants to leave given his history, so his willingness to stay would be a great advantage for us.