Sounds like me, though I went for full-time. Took a 4 month leave of absence. Signed up as an open studies student for the minimum number of courses required to count as full-time. Got all prereqs waived based on work experience. Rocked all my courses. Asked one of the professors to supervise my master's degree. Quit my job. Am now nearing the end of a full-time master's.

(I will note that full-time study is expensive in terms of opportunity cost. In the end, I'll have spent a few years making a quarter of the income I otherwise would have.)