MRE's (aka meals rarely edible) are excellent long term supplies if; a. they are bought fresh b. stored properly c. palatable. It is actually illegal to sell MRE's. The makers conveniently make production overruns for civilian sale. These lack the accessory packs. Your best bet is to buy a variety pack and sample a few. Canned foods are heavy, but that is not so much a problem in a home situation. You at least have the advantage of familiar food. A third option are the large dehydrated #5 cans. They are very inexpensive ( excluding freight charges if purchased at a distance), but utilising large quantities of split peas can lead to waste and spoilage. Other options are the various bulk food co-ops and restaurant supply stores, and the L.D.S. ( Mormon) church maintains stores for bulk foods. They have a tradition of every family storing two years in foodstuffs. If you have any mormon friends ask their advise.