Fuller majored in economics at Auburn University ('57) and received a law degree from the University of Alabama ('60). He married Linda Caldwell of Tuscaloosa, Alabama, in 1959. A successful businessman and lawyer, Fuller became a self-made millionaire by age 29. In 1968, after giving up their wealth to refocus their lives on Christian service, Fuller and his wife, Linda, moved with their children to an interracial farming community in southwest Georgia. Koinonia Farm, founded by Clarence Jordan in 1942, became home to the Fuller family for five years until they moved to Zaire (now the Democratic Republic of the Congo) as missionaries in 1973 with the Christian Church (Disciples of Christ).