Check out the following link:Just wondered if anyone has tested boxed mashed potato flakes, such as you can
I realize they wouldn't keep well for 10-20 years, but maybe 3-4 years. Opinions? Experiences?
I can all my food storage at the LDS Church cannery. If you have an LDS friend or neighbor, ask if you can tag along sometime. In about 2 hours I usually can dry pack 48 gallon cans of dehydrated foods. For planning purposes, I consider 48 cans to be a six month supply of food for one (supplemented with hunting, foraging, gardening, etc). It costs me less than $200. It is a lean amount, but definitely would work. The cans last 5-30 years depending on the product.
It tastes great and there is no markup, just the cost of materials which they provide (you can't BYO). Some areas are "wet" canneries (veggies, meats, fruits). I know the Spokane unit is dry pack. When I was in Idaho we also had a portable unit for infusing nitrogen in cans and would sign it out to use in our home or at church. Not a religious post, but we don't bite!