anyway...price of land AND price of labor can fall as well as price of materials and council duties !
none of those are 'written in stone'...
i though that was fairly easily understood...
tradies don't have to earn $ 50 per hour, concrete doesnt have to be $ 200 per cubic m, council doesn't HAVE to get 20 thou of 'contributions' and state can GIVE AWAY the stamp duty !
we live/lived through all of the above without any specific changes occuring that would warrant impossibility of reversal !