Kyle to answer your questions,
everything you have listed can be legal in QLD,
You are going to be paying out your rear end, and in the end you might as well as wait for a tidy turbo corolla, datto or gemini, which will probably still keep up with your projected build
I can tell you i have 6 ADR codes on my mod plate, and the price, well lets say i could forge my engine and have a GT30 pumping 350hp atw and enough for a family dinner box at maccas
and to clear it up, was no mates rates on the mods, I stuff around with it and he will come after me