One very simple rule that has yet to be proven wrong in any investment boom, regardless of the reasons given as to why a particualr boom is different
ALL BOOMS BUST AND THE BIGGER THE BOOM THE BIGGER THE BUST.
Land shortage in Perth - what a joke
Drive 25-30 kms from the CBD and there are massive amounts of land for development. The same distance in places like Sydney are considered to be close to the CBD.