This is exactly the type of information you want loaded on a HDD tucked away in case of calamity. You won't be able to find all the parts but the ideas would be invaluable.
You can't store food and water on a hard disk, but you can get food from a combine harvester. Agricultural productivity is critically important for food and drink. The Lykov family partly starved to death one winter because their food production was so marginal that a late frost that spring wiped out their millet production for the year: https://en.wikipedia.org/wiki/Lykov_family#History