That is a good plan for the upcoming pandemic or even a natural calamity. Even me i would do the same because we never know when will be the next calamity or pandemic will occur. Based on your plan I think 30 days stocking would be good enough to sustain your needs in times of calamities. We really must think and plan ahead of time before something serious calamity might occur.
The problem is that everyone doesn't know when the next natural disaster will come, because nature never gives an alarm when it wants to show disaster to everyone. However, I also think that it is wise to make food stocks once a month because that is the ideal duration of stocks for everyone and it's also not that long before we make more new food stocks in the next month. Because making food stocks is not solely for the purpose of natural disasters, but more for saving in the lives of each of us.
One of the things on why people would caught unprepared because there's no way that we could be able to predict on what would happen or when the next disaster would happen. Just like on the situation that we do
have on covid pandemic but somewhat we could still be able to buy goods and other things which is essential to our daily survival but on the time we do speak about natural disasters on which this is something that
do talks about having no electricity then it would be having no sense on storing up raw foods or something that could spoil out on which it is really that common sense that you would really be going
after with those canned goods and of course we would really be mainly needing water for us to survive. Basing up on the list given on OP then it would really be just that neough or even too much for 2 people for a whole month.
This is why number or quantities would really be entirely be basing up on the number of people or family members.I cant just fathom about having no electricity on 1-2 days. How much more if months?