@Deadman, have you ever started a garden or tried to produce your own food? I did. It is more expensive than buying organic. I had that craptastic red clay soil which meant composting and raised garden beds. Lumber and soil? $ As it takes several years to produce enough compost. I made use of asking local coffee shops to save their used grounds and went to my local dump who made compost from peoples green waste, but they still charged. Seeds? Sure, I saved seeds but also had to by many at around $50 a year for non gmo seeds.
Raising chickens? Really expensive. I tried to grow enough corn and grain to feed them, it lasted about a month. So feed + lumber + chicken wire $$$ Not to mention my town didn't allow roosters unless you got your neighbors permission, which is the law in most places now. So buying baby chicks every years was not sustainable. Don't get me wrong there is nothing better in the world than fresh eggs and chickens you butchers yourself that have never been frozen. But I was paying more for up keep than I would have if I purchased organic at the store.
Lets not mention my water bill.
Cows? I wanted one, I even looked into a cow share program where you split the cost. Once again fencing was beyond my means. $1,000 at least, not mentions several $ per person for splitting the cow. Butcher costs? $$ I certainly didn't have the tools necessary to do it my self although I am not squeamish about such.
Milk cows are not reasonable unless you you have more than one cow. There is the little problem of the fact they have to have recently given birth to produce milk. If you miss one day of milking because you have the flu? Milk dries up. I figured out long term it would be cheaper to have 5 cows than one, when taken into account seed for pasture and stud fees for a cow that stoped producing. I figured 3 females and 2 stud. would produce enough milk plus the babies when they got old enough for meat.
We did goats when I was a kid. We could never keep the milk supply going for more than a week or so after the kids were weaned. Actually, we ended up bottle feeding the kids, because even before we started milking them, they couldn't produce enough milk.
Your thought is nice, but to tech people to do that, you are going to have to invest thousands of dollars more to help with start up, and get them though the first several years before it is sustainable. Small scale production done by one person is expensive. At the very least you need several people working on one project if it is to be sustainable.
Why not invest that money into one farm that can produce enough food for dozens of households for the same cost it would take to establish one or two private farms?
So long story short, a medium sized far is going to be more efficient $ and labor wise and a personal farm. Especially over the long term.