Mitch, i recently did my Diploma of management through the Local Government Training Institute (LGTI) and it had one of those government rebates so it only cost $600 or something rather than $4k, i assume this is the sort of course you are looking to do?
The course for me was awesome, was relevant to my new position at work and has helped me greatly.....
The course was a little rushed as it was done over 7 months instead of 12 but the amount learnt was brilliant!