Are you considering building a cart to put the body on?
I'm toying with it. I follow the threads on camaros.net for a lot of bodywork tips and they have some good plans out there. Steel tubing is expensive around here and last time I priced it out it would cost over $500 for materials. I can purchase a pre-built rotisserie for $1100 (which would be REALLY handy).
If you read the 1st page, I include where I found the plans in camaros.net
That's one thing that is fairly cheap here. I get the steel from a scarp yard that recycle's old steel into rebar and other products like square tube.