Goku and Chi-Chi don't exactly have an expensive lifestyle. Hell, with Goku around to catch giant fish and stuff, they don't even need to buy food. And if they ever did need money, Chi-Chi's dad is rich.
While Chichi's father is king of fire mountain or something, its not explicit that they are rich, as she is constantly worrying about money, and how she wants her son to marry well. Did you see how excited she was when she found out Videl was Mr Satan's daughter and that her father was loaded? She was practically estatic.
Listen to me Chichi.I...SaiyanAnd I don't want to lose!!That is a true......Well said, Kakarotto....think I've lost if I get a job.