All you're describing sounds way more expensive than a couple carpenters...simply being able to fix a ladder than toss it is a huge saving

Its the little details: -- For example, a 3" Fiberglass Ibeam 10 feet long is ~$200, and only rated to 140 degrees. I can't readily find a more comparable product.

-- your aluminum ladder with high temp rubber, also needs to be electrically insulated; so now you have to toss the whole ladder if the shell is breached in any little way, and probably needs to be re-certified yearly.

edit: i guess you edited while i was replying