And solar panels and a big battery for electricity. And a good sceptic system so i don't have to crap in a hole in the ground outdoors 500 feet away from my house. And a good general store in easy driving distance. And a powerful 4x4 vehicle that can get down to the main road even when the giant driveway path is very muddy or covered in 5 feet of snow. And a decent medical facility not too far away so when a health problem arises i don't lose a limb that could've been saved. And a post office not too far away so i can get packages delivered. And and and ...

I think that comes from the roof.

(water incursion is a huge source of anxiety; this place is NOT for me)

and air conditioning

Find a stream, dig a well, set up a rain collection system, have a cistern / pump / filter.

Yep, its difficult, but not impossible.

People have been doing that for tens of thousands of years... though I will grant you this is increasingly, unrealistically difficult for an average person to pull off these days, even if you basically learn how to properly do all of it yourself, lots more legal restrictions, and construction/materials are costly.