bro chootchiew, how old are you? if you are below 40, my genuine advice is no. i am now a software programmer on weekdays and a relief driver over the weekends.
on the other hand, if you are an outgoing person, which i am, i think it's quite fun at times. especially, you get to talk to office ladies.:o nevertheless, always be a relief driver, dun be hero and be a hirer for a start. i have always been a relief throughout and you will learn a lot thru conversations with your passengers, tourists, PRs, pinoys, china mei meis, ktv freelance, korean freelance, all kinds of pple. when come to near chinese new year, you will be able to sense the jealousy of the indians and malays. mainly, you will learn a lot about sinkies...some bad but most sinkies are good pple, just a little stupid and vulnerable. and once you are seasoned enough, you can volunteer your service to ISD to patrol the roads and look out for terrorists. haha...lol...:p
income wise, if you clocked in 10 to 12 hours on weekends, depends on yourself, you will be able to make $200 nett per nite after rental and diesel deduction.