What do MBA schools look for from an international student?

If I finish my undergrad program in my home country, and would like to move to great MBA schools (say Stern, Kellogg, or Marshall), how do I manage for that? Would admission in private schools be easer compared to public schools like Kelley, Haas or Ross?

I would like to finish my bachelor at my home country since it is MUCH cheaper and also that U.S. MBA would be highly regarded by employers there.

Would anyone help me with this though? I’m a finance major btw.