Pretty obviously I don't think you've done your homework and need to sort out a
few more of the technicalities before setting off for Oz and the start of your
aviation career
.
It seems to me you have done a lot of homework Greg...good onya mate! You sound very determined. If your plan is to get a PPL and build a few hours and you have figured out the financial issues well done... I presume the next step will be to go for the EASA CPL / ATPL back in the UK....but as mentioned in my original response, the hourly cost is better in the UK and much much better in the US so later on, for hour building I would head to the US.
Finally, look into the mundane bureaucracy that makes Australia a world
leader in red tape;
Have to agree with Pontius on that! The whole ASIC/AVID rubbish is beyond belief...But there's plenty of red tape in the UK as well...especially post-EASA
If you can keep going despite the knockers and nay-sayers you will definitely succeed...
Again good luck!
AQ