I do have to wonder how much wealth you can acrew as a Christian, especially a preacher, and represent the faith.
It's one thing to live comfortably, but you have to ask if insulating yourself from humanity isn't opposed to everything Christ represented. After all he was a man who walked the streets and touched lepers, socialized with thieves, and told men to sell their belongings to follow him.
Christianity can't properly be practiced from a palatial estate. Even if Joel is a charitable guy, I think that he and Jesus would not see eye to eye at all on how much money he uses on himself.