I've been watching the same. It seems like the up-front cost is the land, whatever tenement you intend to live in, and a big heap of money because there's just so much stuff you ought to have already, like a truck, and a full set of tools to do all the work required. Anything you don't know how to do yourself you have to pay someone else to do, which is unbelievably expensive.
You probably need heat, especially if you live in the north and have indoor plumbing of any kind, so a wood-burning stove seems like a good way to go. Probably <$1k.
You need some way of disposing of your shit. Shitting in the woods is an option, but there are people living in vans and using some kind of composting toilet, however much that costs.
You need a water source, but provided the land has water under it (maybe you wouldn't if you lived too far above sea level?) but I've seen the procedure for digging a well, and it's neither expensive nor complicated, but the cost and required knowledge add up with all these considerations.
You can't shitpost without electronics, so at a minimum you'd probably want a $100 solar panel, and a much more expensive battery. If all you need is a tablet and don't mind having to run off the tablet battery at night, you could bring the cost down pretty low. If you don't mind the battery system being shitty and inconvenient, you can use lead-acid truck batteries instead of the good kind like you have in your phone. Your panels have to connect to a controller that manages the current and voltage, and that's probably a couple hundred dollars. Traplines and Inlines did a video where he used a signal booster to get reception on his phone in the middle of nowhere, which you'd probably also have to do.
It seems like you can get a surprisingly useful amount of power for ~$2500, recurring every 5-10 years depending on your luck.
You need food, and for that you can maybe scrape by with a henhouse, which could be pretty expensive even if you build it yourself, depending on lumber costs. Nutritionally you need more than eggs, so you're still beholden to the grocery store unless you have people you can barter with reliably.
You'd also need a vehicle (probably a truck) for transportation, which is another thing that can be an order of magnitude more or less expensive if you know how to fix cars, but which also has a large ongoing cost of ownership when parts go bad, which is inevitable.
I wonder about property taxes, though. You can buy the land and all that, but depending on your jurisdiction you probably have to suck off all kinds of regulatory paper-pushers for "licenses" and whatever, on top of being extorted annually for the land.
>What's that? You made something of value on the land that you own? You'll have to pay us double.
>What's that? You're growing your own food and raising your own livestock to subsist on? Time to pay the farmer tax.
I haven't even looked into it because I feel like the fuckery is surely endless, and will worsen as people try to escape from their these collapsing concrete hellscapes.