In my youth, as a poor student, as previously described, my survival bible was 'Frugal Food' from Delia Smith
We been keeping a decent stock of food in for years, partly so we don't always need to go shopping and party to stock up when stuff is on offer. However although we use plenty of cans they're all different sizes. We also find something like tomato puree in a tube is better value than toms in tins.In all seriousness - If one has the space or lives in a slightly rural location then why NOT do this ?