Throughout the Bible we can read about family businesses. In an agrarian society many sons would grow up and do the same kind of job as their fathers. Jesus was probably a carpenter like Joseph. The word carpenter appears only 3 times in the Bible.
Jesus' disciples were also involved in family businesses. Andrew and Simon Peter were fishermen.
Family businesses are still popular in 2013. This infographic by the Family Business Institute reveals that "90% of US businesses are family owned."