Another option is to hunt self-guided for pigs, goats etc.

He would need his own vehicle. A lot of tourists on working holidays or extended holidays buy a "combi" (Volkswagon) type van and travel around in it. Self-accomodating. Or buy a car and use tents. A lot of the Outback does not NECESSARILY need a 4WD. HOWEVER you can get in trouble without one if it rains etc. You can still get in trouble with a 4WD too BTW. Then you might be stuck for a few days. Alot of the old Outback roads have been surfaced now so sometimes a longer route can be worked out to avoid the rougher, more risky roads.

There is a publication which lists properties where you pay by the day. Food, camping gear, firearms and ammo are your own responsibility.

Orion and I went on one of these last August together and even though pigs were not plentiful (drought) enjoyed it.

However for someone who has not done it before even if he wanted to do this I would recommend booking a fair priced hunt FIRST and seeing how it is done. Then think about the DIY approach.