Where are all the planes parked now, as none are flying? In Australia it's a special airport built in the mid of the desert especially for parking planes.
Parking inside city airports should be expensive.
https://www.theaustralian.com.au/nation/coronavirus-the-alice-becomes-a-3bn-aircraft-wonderland/news-story/f986c357d4f21744df9e6140ba8d128e
4-May-2020 1:21 pm