The UP in Michigan, upstate NY, the Poconos, the Rockies, Coeur D'Alene, Idaho, the Ozarks in Arkansas, the Carolinas, or maybe a little tropical island in the South Pacific. So many choices.
Next year we plan on taking a motorcoach around the country to make that very decision, and we have already selected a shelter manufacturer.
http://www.hardenedstructures.com/2050727/default.aspxOf course all the following of your listed requirements are a must:
Regardless of where, it would be nice to be on the water surrounded by more wildlife than people. Of course there would have to be a personal range and enough land for a garden and a few fruit trees. A place where you can shoot of the back porch, pee off the front, and make love on the dock. Sounds like heaven to me. We have feelers out for a private lake, minimum of 20 acres, and at least 40 acres of land. We need 2 houses. One for my family and one for my Brother-in-Law (should just read Brother) and esteemed business partner. You may have met Johnny Bravo on the forum.
I do need to add that we would build with solar, wind and battery storage or we would add it to any existing structure that we purchase. We have discussed the fact that the money put into living off the energy grid would never be recouped, at todays prices, not even if we are able to sell excess power back to the energy company. We believe that the expense is justified by the independence and the security that are provided. The shelter will be installed discretely and the entrance will be from within our home.