Eventually I read a great little book by someone who'd lived through the currency collapse in Argentina, who said all their rural survivalists got picked off by roving gangs. That doesn't mean the gangs had a great life expectancy either. He advocated staying in town and getting to know your neighbors, setting up a neighborhood watch, helping people start gardens, etc.
It would be really interesting to compare/contrast his account from others from Ukraine, Syria, the Balkans. What I hear in your comment is that the advice you heard was about having weapons for a strong defensive posture rather than to be used offensively. I guess the strength of both communities and gangs is in their size, they'll win out over the lone wolf fantasy.
Unfortunately, there are a hell of a lot of people in the US who are essentially "survival LARPers" who imagine themselves as heroic alpha (or, better, sigma!) wolves who fight off thousands of degenerates coming for their canned food. ...Hey, did anyone think to get a can opener?
Yeah no one in the country doesn't own a can opener AND a shotgun or rifle AND know how to can their own veggies. But if you don't have peace, you aren't going to be able to farm in peace.
Do you even have acreage to farm? Do you have tools and skills to farm? If not, how would you get access to it?
Also those "dust bowls" were largely caused by their own incompetence at land management, expecting to import a specific brand of European farming practices to a completely different continent with many different biomes and have everything Just Work, because, of course, God Wanted Them To Take It.
I'm also not trying to claim that there's no value in having the knowledge and tools to defend yourself. But when you've got a bunker full of thousands and thousands of rounds of ammo, enough canned food to survive unpleasantly for about 6 months, and no understanding of how to grow more or interest in learning, that speaks of someone who expects to be murdering other people and taking their food to survive for the rest of his life.
If you want to farm enough to feed your family, you don't need 2,000 acres of farmland. That kind of acreage is mostly needed for specialist farmers and for grain. Furthermore, what's actually effective at making you ready to survive in a situation like what's being posited isn't total self-sufficiency: it's community. The people in the area get together and work out what land should be used for the village's potatoes, peppers, onions, etc, what should be used for pasturage for the animals, and what should be left fallow this year. (Hopefully in collaboration with some of the indigenous people who we haven't totally managed to wipe out, and some of whom still retain their historical land management practices, which were effective at making this land a flourishing place providing plenty of food for millennia before my ancestors came and tried to exterminate them in the name of gold, God, and glory.)
That all being said, there isn't enough land in a town to feed a town. No, you can't live on an herb garden. You need many acres to feed a single family. All modern cities in particular are completely dependent on reliable deliveries from mass production farming operations in rural communities. If that supply chain ever was cut off, there would not be enough food in the cities for the millions that live in them.
http://law2.umkc.edu/faculty/projects/ftrials/dakota/Dak_acc...