Unless you can survive on a VERY tight budget, you need a decent bankroll if you want to live a low-stress life as a gambler.
We'll assume rent/mortgage is $500/month (which is relatively low).
Utils (cable, electric, etc) are $150.
Food, $10 per day. $300 per month. This is probably a low figure if you go to restaurants.
Car insurance, entertainment/alcohol, travel, gas, etc. Maybe you want new clothes. You get the point. It adds up.
In order for me to seriously consider gambling full-time, I'd need at least 100k for bankroll.