I am sorry, but you haven't stated whether or not you can work in Australia.
If you can, then pack your bags and head to the Kimberley.
While you're in Perth, get your Dangerous Goods Certificate, a First Aid Certificate and possibly a large vehicle licence (i.e. bigger than cars).
These are very useful things to have when looking for work in the Kimberley.
As for hours? When I did the journey nearly 20 years ago, it was the norm to have about 1,000 hours before you could get near the Partenavia. It may have changed by now.