To answer your question:
To get a FAA CFI, you have to take the 2 written tests and then a flight test. If you want the CFII another written (fir instrument)and a flight test, and for the MEI a flight test only. the written are easy as you probably already know.
Is it a good idea for business in Europe? I can't tell you but there are FAA pilots in need of a BFR or ICC.
Take care,
Flytoo
