I'd love to find a disused farm or cottage I could, with my skills, rebuild and end up living the life I want. I would, but everything is owned, often by people who don't know what's there! Landowners often have huge areas of land, in excess of 100,000 acres, yet they don't let any of it out to others. It's for Grouse shooting (how to kill thousands of birds in a day, and make money at it), farms, similar (how to be paid not to use the land), or, unfortunately, the churches, who's land is tax-free to them, and has been deeded over the years by people who die. And, let's not mention the lands held by the Royalty (a whole different subject). Other problems are: Local council requirements (who can do what, where), and Government regulations on the same. See for example the guy who built his own Manor House on his own land concealed behind hay bales, only to be told 'Demolish it, it's not a suitable building in this area and there was no planning permission!).'
All I ask is the opportunity to live in a small plot (1/2 acre?) with a small cottage, or place to build, water, and a little foraging.
As to power outages, first, consider what you need, and then think of Solar panels, or wind generation. Balance the cost outlay against savings on what you WOULD pay to the electricity companies. Use wood-burning stoves/ranges/heating. Make what you can before just going and buying it. Likewise on water.. if you have a well, or spring, consider wind-power for a small pump to keep you topped up, and a small water tower. You don't need a massive tower to give enough head of water pressure.
Just a few thoughts, and sorry for the rant, but that is the one thing that stops people going out and doing it.