Bottom line:
IF you really want to be a lawyer, go to law school. First, research the range of jobs lawyers do. Don’t assume you’ll end up in “big law” – most lawyers don’t. Go to law school only if you like the idea of being a lawyer, independent of the hope it will give you parnassah.
Don’t think it will guarantee you becoming rich. Based affordability on the lower paying jobs (civil service, legal aid, small firms, going solo, working for a non-profit) especially when budgetting for student loans.
Even a BTL (meaning a yeshiva background and no real college) won’t prevent becoming a lawyer. You can pick up what you need on your own.
The better law schools (the 20 or so “national schools” including NYU and Columbia in New York) are usually the most expensive and offer the best career opportunities, but going to the rest can be more affordable (especially the public ones).
If you like law and don’t want to bet the farm on going to law school, feel free to become a paralegal.