Instead of storing a year's worth of food, wouldn't it be better to already have a small infrastructure (and hopefully community with your neighbors) set up where you know how to save seeds for next years crops and you understand how your chicken coop works so you can have eggs and meat? At least if you have the minimal space these things need.

Food storage in my mind is for an emergency, so maybe a week or two. That said, of course more is better as long as it doesn't make you a target or take too much of your time or space to keep.

As for the 10k rounds, that should be the minimum and for .22LR only. Then you probably should have another 10k of mixed stuff for your other systems if you can