I'm certain there are better options, but the eastern portions of San Bernardino Co. CA (Mojave Desert) were great for the 7 years I lived off-grid there. A California county might seem counterintuitive, but hear me out: Its the biggest county in the USA by area. The county alone is bigger than 9 U.S states (!). Its also one of the poorest counties in California. This means they have an absurdly large area to manage, but hardly any money / funding to manage it. All of the govt / administration is centered in the extreme west side of the county in the city of San Bernardino, adjacent to LA, and so is all the (lax) code enforcement. All of this leads to the east side of the county being almost like a no-mans land. Some parts truly still have the wild west vibe. Unimproved land is dirt cheap. Federal public land (mostly BLM) is abundant. Water is hard to come by. Sunlight is ridiculously plentiful. The weather is dreamy year round IF you are at a sufficiently high elevation (I lived at ~5500ft ASL), but summers are brutal if you are at elevations <3000 ft. The closer you get to L.A, the more expensive and restrictive things get, but if you stick to the east (I was a 15 minute drive from the NV border), I think its a fantastic spot for off-grid living... if you like the desert.