It’s quite hard to have a conversation when everything gets met by something like this. I will mention that I work in a part of the US with a large Indian immigrant community, and a lot of people I know got their undergrad in India, and a number of those have successfully done grad school here.
So the question is what is your plan B if you don’t manage to get to the US for undergrad? If you want to go to university you need an option somewhere at home. I can’t go back and read through this full thread of well over 100 posts so excuse me if I missed or forgot something, but you said somewhere i believe that your school record is not good enough for top Indian colleges, yet you think it is ok for good schools in the US. Something is not adding up. I come from a developing country myself and believe me, I understand what it is like to feel like you have very few options at home. But the only thing you can ultimately do is make the best of whatever situation you have and if that ends up being going to a local university, go and make the best of it. I did that, and I can almost guarantee you or anyone on this forum probably have never heard of the university I went to, but I got accepted not once but twice to one of the best universities in the world for postgrad. The first time I couldn’t go because I couldn’t make the funding work, but I ended up going some years later. I didn’t give up. All you can do is make the best of what you have. By all means shoot your shot for the US, and look at other countries that are not as expensive for college as well, but if what you are left with is what the vast majority of people in this world (and even in the US are - a college close to home - go into that and give it jour best.
Good luck.