If you are experienced, then consider other prospects as well.
Rex people you work with will be great, its the perils of negotiating a contract before you get here, and the unknown factors that you will find in those contracts after you have signed will be your undoing. Unfortunately history has proven Rex managment to be "snakes in suits" and nothing other than.
I agree with your position to earn an income to support your family, anyone would, its the overall outlook of exchange rate, economy (Australia is about to plateu and head south while this european crisis hangs around), living costs (moderate to high in Oz), away from family and friends factors;
If you do choose to relocate, then explore places where the management are working a bigger ship, as Rex managment think that they are better than the rest which leads to draconian micro-mangement with a win-lose out come.
good luck.