We have never been to Aus and like many others the money used for a reccie could be better put for something else like a car etc .
I have a job secured and am sorting out NBSA registration (i'm a nurse) and can then lodge my visa application. Our house goes on the market next week at last lol
I do think if you have come this far you should bite the bullet and get there - if you dont like it you can go somewhere else!!! including returning to the UK if you are that way inclined
saying that only you and your family can make that decision and reading a forum may not be the best way to make that decision :)
Good luck with what you decide