Aero Developer..
I couldn't give a toss about the intricacies of the economics of your airport or any of the 20 or so facilities that are leased from the Commonwealth Government.. Many airports in this country are making an absolute killing!
You signed up for it.. Your problem.
Just like the accident at Essendon is a real problem for that specific operator... Essendon Fields..
To justify overdevelopment..because the economics of simply running a safe airport are unworkable..is unjustifiable..