cheap, recycleable auto body

Alright, picture an automobile platform much like Gm's skateboard chasis. Essentially, you start with a chasis + engine in a few different engine and wheelbase models. Then, make available a selection of recycleable, plastic body shapes for each chasis/engine config. so, someone could buy a midsize platform and put either a camry-sized sedan or a caravan-sized minivan configuration on top. Plus, this configuration would be interchangable so you could own a caravan and a camry. Of cource, a safety cage would be required but could be easily bolted in and concealed with interior trim. Also, some level of skill and a small boom lift might be required to change configs. but any handyman or mechanic would have no problem. The plastic portions could be recycled if wrecked, as could the metal. electrical and climate control and steering would have to be interfaced simply like plugging one big plug and connecting a big air hose and telescoping one steering shaft. lots of other considerations probably also, but the main idea being that components are easily replaced or changed and recycled