Thanks for your response, and directing me to the right forum.
For starters, we're only looking to do a short piece...probably around 10 mins. I think this length might be more digestible to non-enthusiasts; our goal is to shed a light on an interesting world that many of us don't know about, but not delve too deeply into it.
My interest, as I mentioned, is really more about the personal memories that people have of these machines: the first time they used one or owned one, family stories and memories, and what makes them special, long-lastic objects, in contrast to the way we seem to be going today, with our possessions being more disposable and often intangible.