I wrote a blog on this a couple years ago for the Dallas preppers the place to go is Honeyville. Do the math and figure out protein, carbs, vegetables, and fruit per serving and order case lots. To pull together that much it’ll run you about $3000 and then you’ll have what you need. I parcel mine into tubs two tubs will feed a family of four a balanced diet of 1800 cal per day for a month. (See photo.)
Freeze-dried food is nothing new. As early as the 13th century, the ancient Quechua and Aymara people of Bolivia and Peru pioneered a form of the process by exposing potatoes to the freezing temperatures of the Andes overnight, then drying them in the sun. In 1937, Nestlé used industrial technology to create the world’s first freeze-dried coffee, and in the 60s and 70s, the US military shipped freeze-dried food rations to the troops in Vietnam.