From what people have said, it doesn't look like you can make a living at it -- at least not more than you could get working at Home Depot. It seems like the best tactic is to find out what non-snowboarding-related but decent-paying jobs are available where you can live and work near the mountain. Preferably flex-hours or shift-work so you can ride weekdays.
At your age, you are in a good position to do this -- no dependants, no commitments built up yet. Ask again, but this time ask what types of jobs might fit these criteria.