Disney, the safety net is basically an amount that the govt sets, and once you go over this figure, you get back 80% from medicare. Here's a link explaining it.
For me, it's around $1200, so I passed it with one IVF cycle and some other charges.
I am wondering if you 'committed' to WFC, over the long haul, you may end up spending more money in getting yourself to Sydney. Once you see the FS (which can take a little while depending on who), then you see the clinic, then you go back at the right time of the month. For me, it was first day of my cycle, as I was on what's called an antagonist cycle. So basically that's three visits before you've even started. If you did an antangonist, the cycle takes approx 2 weeks from start to embryo transfer, during that time you have blood tests, scans, then an egg retrieval, followed by an embryo transfer. On the same day as the egg retrieval you need your DH's sperm (fresh, preferably). You may be able to have monitoring scans and blood tests in Qld, but you'd need to check with WFC.
If you were lucky enough to fall PG on first cycle, then voila ! But if not, you'd have to repeat the process all over again.
Anyway, all food for thought. Just if the transport costs add up, it may negate the cheaper costs of WFC.
As a side note, I left WFC because there was a month they were over-booked - but you won't know that until the start of your cycle when you ring up to book in, and that potentially stuffs your travel plans. I am too old to delay the process by a month so moved on to a clinic that can cater better to my needs.
However, I agree with Reebee - if you haven't explored any options, IVF is probably the 'last' resort. Discuss with your GP and maybe have an initial appointment with an FS in Qld to get a better idea for your options.