Order some boxes of MREs. I think most people in the world should have have a month's supply or more.
Just ask any guy who was stuck in some shithole in their service about what happens after you eat MREs for 2-3 days strait.
Commercial MREs should be fine, not military ones.
MREs are for combat situations. Lots of the things you need to stay awake, run, fight, and survive. Not much of the stuff you need to live a day to day with.
I think it is worth having a root cellar. I was always impressed as a young boy by Badger in Wind and the Willows. The illustrations in the books used to show all the sacks of potatoes and onions he had and I remember being very impressed by his hideaway. Pretty sure he had a shotgun as well.
You believe commercial MREs are better than military ones?
There are two problems for preparation. We are typically restricted in the quantity we can buy and they often don't have a long shelf life.
I myself have enough MREs for about one month. I get mine from mealkitsupply.com and hotpackmeals.co.uk. These are self heating ration packs which is nice if the electric cuts out.
The mealkits last for five years, probably ten years to be honest. I've seen people eat MREs from the Korean War and they were perfectly good to eat.
The hotpacks last only three years, but are quite nice to eat and I tend to use them up as I go for lunches.
http://www.mealkitsupply.com/MRE/US/
1200 kcal per pack, 12 pack for $130, lasts five years (probably much longer if you store properly).
The rest I got from hotpackmeals.
http://www.hotpackmeals.co.uk/
360 kcal per pack, 24 pack for £114.00, lasts three years.
The flameless ration heaters the MRE companies supply are awesome.