I am not sure if you read / understood what I wrote. Tuition for masters program is not at all expensive compared to post graduate diploma courses. As I said in my previous post, after first semester, you will usually get graduate teaching assistanship or research assistantship so the overall costs are way less compared to diploma courses. And if you decide to move to Ph.D after first term/year, your professor will arrange for some kind of funding for your Ph.D.But the tuition fee for most masters courses is a lot expensive. I was thinking of going for a Skill-based course that helps in joining a biotech company or such.
Moreover chances of visa rejection are very low for masters program in sciences (which is directly related to your education in India). Yes, you may have to spend a bit more initially to pay first term fees (which is still less compared to diploma program), but in the long run it will be beneficial to you as you can get some kind of funding but for diploma courses, there is no chance of funding for your whole program. So you have to decide how to proceed.