I'm hearing discrepant stories, one which is that Mikey peed away virtually the whole fund on lawyers to kill Terri, and another that he has a stash somewhere. Usually the one I hear is that the money is gone. However I would assume his property (house, cars, etc.) are paid for, so there's some dough.
Actually, my understanding is both. He has spent some, but a great deal remains in trust fund that has been accumulating. He stands to inherit a great deal of money.