"A lot of professional athletes and musicians and entertainers love cannabis," Joseph said. Now, Big Plan is teaming up with cannabis retailer Silver Therapeutics to buy $35 million of marijuana-related commercial real estate in New England. Unlike most family offices, Big Plan didn't actually start with a big plan or mission. Sydni oversees business development and handles due diligence and screening for potential deals, while Sophie is president of the Joseph Family foundation. "My number one piece of advice for other family offices is get your kids involved," he said.

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Persons: Josh Joseph, Joseph, CNBC's, South Joseph, He's, seltzer, we're, Josh, Tara, Sydni, Sophie, we've Organizations: Grassroots, Big, Holdings, Vegas, Broadway, Music City, NBA, Silver Therapeutics, University of Illinois Locations: Nashville, South, cannabidiol, Chicago, New England, Austin