Bankstown Airport for sale.
The airspace could be designed to work based on overseas models, but we're talking Australian Airspace. Do as I did, draw some airspace steps using the same dimensions as YSSY on Badgerys and you'll see what I'm basing my comments on. For years various organisations have been lobbying to reduce the dimensions of YSSY without success, so I can't see why they'd reduce them now. In any case, moving YSBK YSCN operators to Badgerys would provide the developers some income pending airlines establishing their roots there.