I thought about doing it a couple of years ago and I'm so thankful that I didn't.
Look, here is your chance to do your pre-med here in the U.S. at your home school by your family and friends. Here is where you can apply those classes to 100+ medical schools and probably get into 1.
Now there... you're doing your pre-med in St. Georges. If for any reason you do not matriculate to their medical school, those units do not apply to the 100+ other schools. You are away from your life when you don't have to be...
Do not do it... enjoy your life where you are, get good grades and you'll be fine.
Best of luck,
J