Decision making in regards of choosing the right colleges.

Hello all, I might be too young to post here as I am only a senior in high-school but I have been suggested to post here to seek some advice. I am originally from a country in South Asia and plan to study economics in college with eventual hopes of becoming an Investment Banker. I am split between going to one of the better universities in the UK such as UCL, Warwick, Manchester or settling for a mid tier LAC in the US ( main hindrance of getting into better places would be the financial aid I require). My question therefore is if I go the the UK to study at a reputable university, will I be able to eventually land a job in the US? I fully intend on doing my masters from the US so there is no question about that , however I was wondering if I could get a decent job in the US right after university in the UK or maybe after garnering some work experience. My main reason for wanting to work in the US is better job opportunities paired with some family reasons, thanks a bunch .