I guess this question goes back to why you are SS that was on another thread. I do the things I do because they give me satisfaction and I enjoy it, not necessarily because I really think I can be self-sufficient. Unfortunately, it really does take a community of humans working together to actually get all the pieces right to be sufficient- as a group! If we all lived in the same town we would have a kick-ass community!!
My garden sucks- it is shady (anyone know shade loving veggies??) it's on a hillside, and I don't LIKE gardening! My SO's 3 sisters garden is doing great (she likes gardening). (my garden has tomatoes and peppers- I thought the spot was sunnier than it is- and winter squashes, and beans for drying). So, we will have corn, squash and beans from the 3 sisters this year it is looking like. No tomatoes for our home made pizza

On the other hand, my kombucha is good and growing and delicious, and my yogurt is yummy (even if my SO won't eat it!) and my laundry detergent works great, and I LOVE making soap

And I am trying my hand at dehydrating things, too- even if I have to buy them cheap at a local farmer's market instead of growing my own. The Dehydrate2store website says you can dehydrate soup! (seems a bit extreme to me!) Our fruit trees have only ever had fruit on one Fuji apple tree. The Mac apple, the two plums and the grafted cherry have never even had blooms. But they attract lots of Japanese beetles that the hens love for breakfast and dinner treats

And, I love fiber! My alpaca fleeces are slowly turning into yarn and I have so much hand spun brown sheep wool that I am sick of the color. I am thinking about a small table loom to supplement my daughter's child fixed heddle loom for scarf sized material. I can clothe us, keep us warm, and keep us clean, even if I can't feed us!
Our hens are also residents for life, and are now 6 years old- that's why we are raising 6 more chicks in the house who are so stinkin' cute! One of our hens is still laying almost an egg a day at her advanced age

We are mostly vegetarian with the occasional local beef hamburger. Not by my choice, but it helps keep peace in the house if I limit my meat- even though SO says I don't have to.

The horses- OK, they are a money sink and a waste of time now that I no longer have time to ride much. My horse time is just keeping up with taking care of them, but I'm lousy at selling, and 4 of them are un-saleable anyway. The bees, well, they are a first year experiment that I hope aren't failing. We'll see about them if they fail I may not try again. They are much more worry and time than I thought they'd be. (I spent last night awake worrying about them :/) Maybe I need wild bees to pollinate that I don't have to worry about them- although one of the reasons we got a hive was because of the collapse of the wild bees.
So, I guess it is a matter of picking the things that you enjoy most and cut your losses on things you don't enjoy. SS is accomplished in little steps and ideally need a community of like-minded people around you to teach and support- and trade what you can't do for what you can!