I think we can show that for the benefit of the taxpayer we should move Perth international!
I'd like to see your maths [please] if you don't mind...
Move military from ramshackle facilities needing refurbishment (old buildings etc, RSAF facility not included) at YPEA to an existing military facility (eg runways and taxiways in place) that will need some new buildings. Or...
Move modern and constantly updated facilities (airport and freight terminals) at YPPH to an airport that hasn't been built yet and is currently sand and scrub lacking the transport links to the city.
with economics like that, you must be a member of the Liberal party(?).