DanzoGL

I'm 25 years old living in england and just got my 12 month working visa for Australia, I plan to find some plumbing / gas work out there but need some advice. My gas runs out next month and im not sure if i really need to spend £750 renewing it, does it benefit me having it in Australia. Ill be wasting at least 18 months out of my 5 years of gas if I renew before going away. I basically want to know the pros and cons so i can make a decision.
Thanks
Dan