RFDS relies heavily on donations for the aquisition of new aircraft.
The people of the bush (and the city)are aware of this and have got behind the RFDS since its inception. The RFDS has, over a long time, earnt the respect of these people - many of whom have seen loved ones helped if not saved. People who sleep well at night knowing that the "mantle of safety" is there if needed.
I doubt the same level of respect and support will be shown to a newcommer.
They are some big boots to fill.
Good luck!