The JAR-FCL FI(A)(Instructors Rating Restricted) will cost you around 5k. Well that's what mine cost anyway.
For the difference between an Integrated course and a Modular course you could do the FI(A) and an MCC course, go to work flight instructing, build up constructive hours and be a much better pilot for it, experienced, knowledgeable and skilled!
I've probably gone right off the point...So I'll stop.
Stick & Rudder......