Establishing a single family office isn’t the only way to ensure continuity in a family enterprise: Tom Sween, chairman of E.A. Sween Company, and his family have built a deep, trusting relationship with their multifamily office — so deep in fact that if something were to happen to both Sween and his son, it would be executives from that family office who would step in to advise the family and the board on the business’s future.