I think it really depends on how the Steelers finish out this season.
IF they go on a run and the Bengals lose to the Colts, the Steelers would actually win the division.
IF Ben pulled that out, they would continue to build the offensive line and he negotiates a new contract that works out much better for both of them.
IF they go down in flames, the Steeler organization may shake up the team and move on with some high draft picks...like a QB and another Olineman and skill player/TE for the future. IF they traded Ben for some high picks on top of that, they could reload rather quickly and make noise as soon as next season.
I assume you mean money as " for anything he wants?" Frankly, he is quite polarizing in the Pittsburgh community, not 50/50, but enough so that it draws attention. He has made enough money and accomplished enough that I don't think he will be too adamant about making crazy money. I don't think the will ask for much more than he already gets, at least that is my layman's opinion based on the insightful world of the Internet. He stated that he will do whatever it takes to stay in Pittsburgh.
I think he will sign for 3-4 more years with Pittsburgh, and then retire to raise his kids.