Yes man,
QF don't require you to pay for endorsements at this stage. It is doubtfully that the issue will arise during the interview. If it does, it will be along the lines of "what do you think of people who pay for endorsements?"
Your 500 hrs command and other quals. are the bare minima for QF. Put in an application and see what happens. It may take some time for you to get an interview. To be frank (and not trying to sound unkind), there will be many other candidates with superior experience who will be given an invite for the psych. test before you. In the interim, keep doing what you are doing; keep up the flying and do what you can to prepare yourself.
Preparation should include improving your aeronautical and industry knowledge and contemplation of interview questions. Get hold of a pyschometric exam book and PRACTICE. Rememeber to enjoy what you are doing now; GA has its good times and these should be valued. The fire in the belly to move on can put a tarnish on what is a significant element of your career.
Good luck.
Dont worry about the ravings of a few ninnies on this forum who are filled with an insane hatred of those at J* and have paid for a type rating. These people see that their career path is being truncated by managers who are shifting a lot of QF flying to the LCC. Keg, et-al, have failed to grasp the shift in Australian employement trends to what is the world wide norm. By blaming 'self-improvers' for their stalled career progress, they reveal both a misunderstanding of the industry dynamics and also their capacity for selfishness.