Dont think in terms of how quickly you can do it. Doing these fast track type courses are not always a good idea. If you think about it the whole syllabus is crammed into a matter of weeks and trying to remember everything would be very difficult to say the least. The weather is also a consideration as well you would probably be flying in pretty good weather all the time during the course and not encounter different types of weather. You may find you might be doing some re-training back home to compensate for anything you havent experienced and that adds extra ££s (or in your case $$s) to what you have already spent, it is probably better to stay where you are and take your time over it.