First, it takes a lot of time to learn the theory and strategy of card counting and get your counting speed up to casino play. You will also need a large bankroll of at least $50,000, but preferably $100,000. To make a decent living you have to be comfortable with a bet spread of at least $25-$300 and it takes a large bankroll to sustain the ups and downs. For most people, I think it is better to play part time.