Well actually its just three.
Not only will the reapirman come in and fix your busted things but if you have enough cash to throw around and you call him everyday and have him reaplce all your busted lightbulbs as well. This is useful considering the fact that the lights go out a lot faster than the original sims and you have little time to be changing them constantly.
Another interesting fact about the repairman is that sometimes he'll hang out at your house and watch tv. This happens most often if you have the giant multi- screen tv on when he arrives. he'll sit down and start wathcing and laughing which is useful for building up your fun and SOCIAL meters at the same time because he talks to you when your both doing it.