There is almost no merit-based aid for MBA students. They (or the company that they work for) are expected to pay full costs. Most US MBA students would pay for their education with loans, and plan on paying the loan off with the good job they get after graduation. International students cannot borrow those kinds of loans without a US co-signer. Before you get to excited about an MBA, you need to come up with a solid plan to pay for it.
If you want a US MBA, it might make more sense to study in your home country, and then come to the US for that MBA.