Cost analysis is definitly not my thing, thanks for your efforts.
Before I had large freezers, I relied a lot on canned food sales. My focus is seafood so I'd grab canned shrimp, clams, crab, etc., when it was on sale, as well as canned vegies. With such a long shelf life, it saved me a ton of money (still does, for that matter). The only catch was salt - many canned foods have too much. If I can't find low-sodium, I soak and rinse them. Hardly a month goes by that I don't find a screaming good deal on something canned, often well under a dollar even for organics.
The vet bill savings is a very good point! With fish, they simply die when not cared for properly, so it's a lot of sad goodbyes as well as financial loss.
It says something when your child opens the fridge and says routinely "Is that for us or the fish?"
