Good luck!
I’m curious as to how much of the development of the follow-on ground-up airframe can actually be done in Australia, though. To my knowledge the largest aircraft ever designed in Australia was the GAF Nomad, and that was more than 50 years ago!
Given the sheer scale of specialised engineering skills required, aren’t you going to end up having to have the majority of your engineering staff in the USA and/or Europe?