>>1394382> Freeze DryingA company called Harvest Right is making home freeze-dryers. The medium size is about $2,500 I think. I would be more inspired to do gardening if I had one of these things, grow as much as possible and freeze-dry it. It is the best way to store food long term, preserves nutrition values the best.
A quick search turned up this site, which sells bulk freeze-dried ingredients you could use to make your own meals:
https://valleyfoodstorage.com/product-category/bulk-options/There are probably other places to get this stuff as well.