It looks to me as if there's a few bare patches that could do with filling up - I wonder if there's a geo database of airfields you could overlay and which might show where best to target new installations?
From the brief look I had at CASA's application form it didn't seem to me to be geo-fenced. By that I mean that if a group domiciled in Brisbane regularly flew to the middle of W.A. (unlikely I know but you get the point!) then I see no reason why they couldn't apply for funding for a camera or two along the way, and in W.A.?
Better still perhaps if various people got together and applied some reasonable logic to the above and presented a creditable case for a number of cameras in strategic positions...
FP.