I’d suggest putting more thought into the process if you really want to prepare. It takes a great deal more food than you would think.
Store what you eat, eat what you store and you don’t throw anything away.
I live in the burbs. That won't cut it in the worst of times, this place will be immediately abandoned. There is no way to buy and store enough food to feed 4 people for any extended length of time.
I have 25 acres with 15 tillable, but it's 120 miles from the city where I live. I bought it from my parents who still live on the ground. The plan is to have enough gasoline, food and supplies on hand to load the trucks, drive there and live through one winter. Already have seed stocked up at dad's in dry storage. I'm banking on workable gardens the first summer, otherwise we are toast.
Dad has 500 gallons of bio-diesel stored up and a single-cyl 5hp converted diesel generator, several wells down and one is on a windmill pump so he's got a horse in this race too. We have enough land to support all of us I believe. I think we will also have enough short-term electricity to help build anything we may need.
I come from a long line of Kentucky hill dwellers so we know how to survive. As much as it would suck, it'll be a family effort and I believe we will do ok. My real hope is to die and old man wishing I'd never wasted the time and money on all of it.