G'day Wayne,
Before you spend any cash, are you able to work in the US? No point in spending all that cash if you can't use the licences.
WIth regards to getting your medical reviewed back in Europe. Sit down and have a chat with the medical branch. Speak to them about reviews after X hours experience etc. If your eyes are outside renewal tolerances then it does get harder to push your case. If it's a condition that is an out and out no, seriously rethink spending all that cash.