Another factor to consider is how good you really are at poker. Are you really cut out for it? Most people aren't. Here are some of the qualities that you need to become a successful professional poker player:
Have good temperament, discipline and self-control.
You need to be fairly intelligent. You don't need to be a genius, but if you are always bottom of your Math's class then reconsider your career.
Have a reasonable mathematical background - you need a general understanding of odds and variance.