I don't know about law school, but business school does provide loans yet with high interest rate to get through their study. I think you should consult with the schools you'll apply to figure out if they have financial support for international students. For some schools, even if you can't have that for the first year, you probably will get some sort of support in your second year or later. I understand your concern. If there's no way to work this out, you can depend on your parents' support and figure out a way to get financial support after you start the program.  

Accounting is actually good career (I personally am in accounting), so does law. You've made up of your mind, and we'll all wish you every success in your study and career