Why does my pastor, like most pastors, have a really nice house and cars?

I just think that if God chose you to spread his word, you would be happy to have a room in the back of the church with a little kitchen and have a dependable car to get you around. Why do they need the big houses and cars with the nice shiny rims? If they were told they would have to live like I just mentioned in the small room and what not, how many of them would accept? for God