flvckoflyer, you've got a good attitude concerning this difficult situation. I hope it all works out well for you.
I understand your desire to continue in aviation. But, in your mid twenties, this event represents a great opportunity to change career, find some new interests and work on your health. You may well find it easier to get ahead financially in another occupation, probably more job security and less stress outside aviation too, which will help in restoring your health.
My suggestion is not to fight CASA. Be grateful for the flying you've done, close your log book and walk away. This will save you an awful lot of angst.
Eventually, when your health is restored, you can take up flying again.
Also, in your mid twenties, you are still young enough to get a work visa overseas. Maybe a working holiday while you consider your options?
All the best
