ask... amishdude.... He's the man in all things Lancaster. How come the Amish don't have a casino?
As to the church owning property, I doubt if it's true. In some sense it's not important as the family just takes over the dwelling generation after generation. They also avoid the death tax because agricultural property has huge exemptions these days -- not for the Amish but for midwest family farms.
Amish electricians are hard to find to wire the place !