Trump is doing this for patriotic reasons. He doesn't need the money. I would not be surprised if he just say f it. If I can read body language it appears to me he really doesn't want the job which is why I like him.
Oh, please, not even close. The media is in the tank for him. If he can't handle that, there is no way he can defend the country from ISIS. Trump's whole brand is being undefeatable. You don' accidentally slip and, 'I've decided to change...' Especially since none of his critics have been pounding on him about that particular issue. If he wins the nomination, you can expect him to be more honest about a lot of his positions.
Well, I would contest that, but more importantly he is driven by deep insecurity and needs attention constantly.