Boy, you have aluminatitus pretty bad. Three vintage Airstreams!
I have a 66 Trade Wind twin that I've been working on for some time. It is much different than yours as it has the old body style. After a couple of winters working on it, I do have it travel worthy. I'm fortunate to have a shop big enough to work on it indoors during the winter months.
You will have to start a refurb thread and document your findings and rebuild. Maybe it will end up being a shell off frame rebuild project.