[otter]

It may be, but not quite yet. $15k isn't enough of a bankroll if you'll use it for your expenses also. It's stressful when you have a losing month AND your expenses come out of your bankroll. I've been there. Try to build up a bigger bank. On top of that I'm not sure that you've put in enough hours if you only play 4-6 times a month...but then again you do have a fall back plan; graduate school.

It's not as easy as it looks. Outside of good game selection you need good money management and discipline as well as being able to be honest w/ yourself. Grinding a cash game is hard work too