Choosing a B-school can be a tricky decision especially when it comes to ROI. I understand that ROI is one of the most important factors when it comes to MBA courses since funding your education with loans come with its own set of challenges. But the institutes that you have mentioned above certainly surpass the challenges since they belong to the tier 1 category. 

You might come across articles and blogs stating that FMS or JBIMS do not provide a typical MBA environment but for me, that discussion does not even make sense. What is an MBA environment after all? You spent 2 years of your life at the campus and wish to land a good job. FMS, JBIMS, and IIT Bombay all three have good market reputations, they home the best candidates and charge minimal fees. So, if ROI is even a little bit of a concern for you, go for these colleges without any second thought or regret.