Arnold was a pro. He's done pretty well in the finance department since retiring from bodybuilding. Of course, he probably will have to part with a few bucks to get through the divorce. But, when all is said and done he won't have to hawk supplements for a living.
Some pros devote all their time to bodybuilding, while others do it as a sideline business. And then some simply go into business or get a job after they retire from bodybuilding.
Kai Greene should have a few years in a lucrative career as a hustler after he retires....oh that's right he's probably already supplementing his bodybuilding career selling his body to schmos. No offense intended. After all, a fella's gotta do what a fella's gotta do.