Even if you have 1000 acres it still comes down to what you intend to shoot.
If you want a 308 you need a property with pigs, goat, camel, wild horse etc
One of my mates got rejected on 10 000 acres because in that area there was just kangaroos, foxes, rabbits & wild cats reported.
From the knowledge I obtained ~ a year ago it's comes down to what's on the property mainly and not just the size. Just be sure to mention the difficulties with terrain etc hence needing something that can shoot a long distance