You can graduate law school by 22 no problem.
Graduate high school at 17. Year in seminary, second year in maalot oir something and walk out with undergrad from thomas jefferson at 19. Three years of law school and now you’re 22. Walk into a job at a top law firm and you can support your husband in kollel forever.
Best is husband won’t need to leave the dorm because you’ll never be home (assuming you’re in NYC)(otherwise you’ll be home a bit but it won’t bother you that he stays late in seder)