I should have been more clear in my initial message, but I didn't think
about it until now. The problem isn't that I can't carry a 30 or 40
pound ladder from one place to another. It's not really the weight.
It's the awkwardness of trying to get a 20' ladder from the ground
against the building by myself. I think I had in mind something like
the telescoping ladder, but with a hand crank. :)