You say that "most of the time I have to play for hours and hours", have you figured out your per hour win rate. Seems to me that when you only buy-in for $100 and leave with as little as $70 in winnings (when you win)that your per hour rate would be very low. Beside the fact that I don't believe you know the right way to play short stack poker, it's seem to me that a reg job with set wages might be more profitable on a hourly basis. The why you play you will never make any real money.