Blacktown allegedly has a capacity of 8,000. While it has token stadium seating on one wing realistically it's just a banked hill right around the field that's going to be holding at least 7,000 of those entrants.
This is exactly the model they should be using. It is a nice little ground with a decent sized grandstand that has good facilities for toilets, media, coaches boxes. The banked hill around it is a decent size and it has lights and a scoreboard.
This is exactly the type of thing they should be building. The stand adds a fair bit to the cost but just allows the ground to become an event destination and might actually make it easier to build the facility rather than harder.