Bands or any business. One family member is enough. I know brothers here in Atlanta who were not speaking to each other the last time I saw them. They started making R&R tee shirts, tour stuff and shirts to sell in clubs back in the 70s. In the 90s the business had grown so large that they sold out to a huge company that was making most of the NASCAR shirts and hats... but something went wrong and as always it involved money... sad.
Falling out over an Elvis costume is a new one on me... I mean surely there was more to it than that. Please tell me that the costume was the "last straw" in a string of events.