Itsbroken....
Some of your information is not correct, you can take the exam more than two times I know of people who have more times than two.
Medical is not done on arrival but to extend your FATA beyond 3 months, most people at my airline have been passing it witout any problems.
Including two FAA pilots unable to hold a JAA medical, so please dont paint such a dark picture.
If your with a good company they will take care of it all, mine did and do!
PT6A