I would like to do get a FAA CFI certificate. And I knew that passing rate for CFI course is quite low. 
However, my time is running short and does not permit me to stay long in U.S. 
Therefore, I would like to know whether is there any school able to pass student to get CFI certificate "easily".
Money is not an issue. I hope to complete the CFI course within my time and leave U.S.
Kindly 'private message' to me if you have any recommendation. Millions of thanks!