Krishna,
Well let me first of all tell you that BEFORE you think about financing your education, think about what you want to do, where you want to go, and what your goals are. Because I think in general, you can always get loans for whatever school you go into, and if you get into a top school like HBS and Kellogg, even if they cost more than 45000 per year, it is well worth it.

If you are looking for tuition comparisons, there are plenty of resources on the internet like the Financial Times rankings, for the Businessweek business school profiles, but like I wrote, I think first you want to figure out what you want and why, and THEN worry about the money.