You could become a regional airline captain and still have time to climb the seniority ladder (assuming your regional doesn't go BK or lose it's contract).

You could also get on with a major, but since seniority progression is much slower at a major you would spend years paying dues only to finish off as a mid-seniority (maybe) domestic FO...probably too much BS for the brief payoff.

You will need more than just enough money for flight school...I assume your house is paid for and retirement is funded?