I had a mate who did a short spell with the RFDS,
Basically maintenance is as good as it gets, they can't afford to have an aircraft break down when a call comes in so write it up and it's fixed no questions asked.
They really look after you and job security is excellent.
By GA standards pay is good however he did mention that the flight nurse earned more than he did.
Base was determined by supply and demand, apparently Charleville was popular and no one wanted to leave.
You are required to live within a certain distance/time to the airport.
Single pilot IFR, and could be quite demanding when trying to land on a bush strip during a stormy night.
It's a unique job, like flying in Antarctica or being a seaplane pilot in the Maldives.