What does it take to make a living at punting?

was the original post about making a living at the track? thought i'd interject--hope it has yet to come up--was there a fellow from the Chicago tribune racing section that spent a year at the track a couple of years back trying to make a living. he wrote a book about it which i read. in case any body is interested he came out ahead slightly. interesting book. unable to find it now at russell meerdink or exclusively equine.