I kind of already did that all that stuff. During the pandemic I saw the writing on the wall: the united states is doomed to fail unless we get major reforms that are never going to happen.
I bought a cheap lathe. I then built a furnace and a burner. I then built an end mill out of scrap metal which I then used to build a forced air intake burner so I can melt stuff with less fuel. I've researched and experimented with electronics to the point I can build just about anything. Electric motors, computer logic, you name it. It helps that I have a computer engineering degree anyway. I found a decent way to produce my own double layer circuit boards which is going to pay off now that custom pcb services will become 100% unattainable by normal people. Right now I'm engineering a way to build a brushless motor controller, completely out of trash without buying anything of course.
I've learned how to make my own lead acid battery plates. I've figured out enough chemistry on my own to make all the bases and acids in at least some capacity out of stuff I can acquire for either free or really cheap.
I still have a lot to learn and a lot to do but i'm far enough along I can continue doing that no matter how much worse and more expensive society becomes.
I'm ready for the bitter fucking end of modernity. I'm not living like people did in the 1600s, period. And I definitely won't be helping people who supported things I oppose.