Carbon the molds they are laid up in is where the investment is made, and there is lots of hand labor ..
Aluminum the welding work to put it together is on the material itself.
Then there is the post welding normalization , and heat treatment ..
I'm looking into purchasing an endurance road cycle to ride from Seattle to DC (not touring, I'll have a van and crew following the team with all our gear) and need to make a proper decision.
Think Backups, buy a couple bikes so you have a spare , problem solved,
might invest in extra spare wheels too.