When the restaurant was open we had a small manual my wife referred to as "The God Book." It contained all kinds of info on operations and maintenance.
At home now, she pretty much knows how to run everything here, even if we lose power for days she knows how to operate back up systems or shift to off grid type living.
But, I think k the idea is wonderful, and maybe we should put so.ething together for the kids in case something happens to the two of us.