As to the original list, it might sound nice but first time you have an issue, everything is custom and you will need specialty crews to work on it...seriously, what do you think you will get out of carbon fiber sides?
High strength to weight ratio? Far in excess of fiberglass? Why do five thousand dollar bicycles have carbon fiber construction?
As far as aluminum frame is considered, I have seen many a big rig with aluminum frames. Much thicker than steel. I know aircraft are made from aluminum but it takes a special structure of it to make it effective. The same finish weight of aluminum, a titanium frame is fatigue resistant and break resistant. It's all designed for weight savings
None of these "what if" discussions are practical in themselves. What I intended is a hatchery of ideas and thoughts that might be distilled into practical ideas and adaptations.