I'm pretty much in the same boat as yourself in age and from my experience I packed up left a supportive wife and kid back home for the Kimberley's. Spent 10 months setting up home working a job and banging on doors every 2 or so weeks and sadly nothing. Other people I know went on to Darwin and even worked for an operator doing admin work and yet didn't get a shot.
The worst part is not having the money
to keep flying up to a standard and remaining current.
I think the idea of working in your current job and travelling might save you the heartache if you don't become successful in a flying gig.
But you never know unless you give it a shot