Dunno why steel is so expensive for you? I bought all mine from Midalia and probably cost less than $300 for complete chassis.
Maybe worth looking in old post from 7ish as he is in NZ and went a slightly different route to the sierra donor.
Unfortunately we have to apply for permission from DPI to build the car here and also get it inspected at various stages along the way by an engineer and then a final inspection when completed.
