A lot of them did. The one that comes to my mind... For all of his flash, Gotti had a normal looking house. I just found the house he had in PA. That was a nice house. But it seems like a lot of bosses had modest homes and nice vacation homes. I think Meyer Lanaky wins with his Hallandale home. Even though it's at least a million dollar home. Santo's home in Tampa was modest as well.
Castellano seems like he had the nicest home in the Gambino crime family.
