Hopefuly I would have pelnty of food for me, the girlfriend, the critters, lots of food, the gas bill paid, the electric paid, water bill paid, and the net bill paid. (Not to mention lots of reloading components, and adult beverages.)
If I am stuck at home I would not need much ammo. I go to the range to shoot it all up. If I were for some reason stuck at home for a month. I would probably be killing time on my relaoding bench. If so I would have thousands of rounds of each caliber I reload for. Not to mention prepping up the excess brass I have been putting off doing anything with.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.