<p>When you say your son wants to become a doctor, do you mean he wants to get a PhD, or do you mean he wants to be a medical doctor? </p>
<p>If the latter, then you need to know that medical degrees are undergraduate degrees in the UK and the number of international students admitted is capped by the UK Government. There is almost no financial aid available. Your son would also need to check if a UK medical degree would qualify him to practice as a doctor in the US.</p>