It’s very unfortunate that you have to rely on only a BTL in getting into a school. If you had a degree from Touro, YU, Brooklyn, or Queens, Columbia would be a sure thing and you’d likely be in at Harvard.
However, assuming that you want to stay in New York and the best school that you will get into is Fordham (I know Columbia is reluctant to accept BTLs and NYU does not accept them), you should think twice before enrolling. While it is true that you will likely get a very generous scholarship, it is very improbable that you will get a typical ‘biglaw’ job that pays the standard $160,000/year salary for first-year associates. From what I have heard from friends at Fordham, less than 10% of frum people have gotten that type of job this year. There is no reason to think that you will be the one that beats the odds.
If you are fine with working for a firm that pays $50-80k or a governmental agency paying $40-60k, then law school is a fine choice, but DO NOT go in expecting to earn the big bucks.