Proud to be a NEET.

Sadly, it only works if you make millions in fighting tournaments every year.

That's easy for Vegeta to say, his wife's like the richest woman in the world, it doesn't matter if doesn't work a single day of his life.

Although it seems Gohan's became a world-famous scholar so Goku can leech of his son right?

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.

^and goku could just win another tournament to get money

which brings up the question Yuyuko vs Goku in an eating contest o.o

^well...lets just say that a Half-Ghost Sayan would be born

Goku needs to give Dana White a call or something, just earn money fighting.

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.