Many of the items you posted concerning self-sufficiency are among the most minor of the concerns. What you list is just sort of the get-started list. ~~There actually is no such thing as s-s. You need a tremendous amount of money to acquire the needed goods to (pretend) to be s-s. Then you need money income to pay the taxes so you get to keep the land you occupy.
But the biggest concerns to s-s is steel, weather and birth control. You need absolutely efficient birth control because babies grow to adults. Then you need to return to the acquiring mass goods to set up the s-s homestead for them. And there is no functioning system anywhere to does not require steel. That is something you cannot make -Somebody mentioned the Amish as a s-s example. BUT, they aren't. -Plow shares, buggy wheel rims, hand saws, anvils, hammers, nails, wheel bearings, sewing machines, horseshoes ... the list is endless of things they need and cannot make. And weather, climate, ground, soil, fertility are most important to s-s. You are not going to be entirely s-s with very poor dirt, lack of rain, too hot, too cold, too rocky. Poor growing conditions means much greater inputs to try to live. Not very s-s.
The best anyone can hope for is to be as self-contained as you can be, but you'll never be s-s. You'll need a good, reliable income source for the occasional broken arm, tax bill, buggy wheel. You'll need vast knowledge in every single aspect of daily living, you'll need a tremendous number of tools, just to produce clothes and can winter food supplies, capture/carry/store water, make rope, have fencing, roof a barn, ten thousand other things. You'll need a Midwife. An Herbalist. A blacksmith. Woodworker. Barrel maker. Gardener.
--We do all that. Have been doing it for 60 years. We have well over 100,000 tools. Many cabins for folks. Piles of scrap metal. More horse drawn equipment than most folks can imagine. Every single trade set up in its own building. Passed down family knowledge. We live on some of the best soil in the world, and the best weather possible (in my opinion). We're as close to being self-sufficient as you can get. ~And yet, there's the Amazon truck.
So, my advice is to stop dreaming of being self-sufficient. You won't do any better than the Amish (we have family and friends among them). Just do as much as you can, to get out of mainstream life as you can. --But be prepared for inter-acting with the tractor dealership on occasion.
