I have a friend who lives in a house near a mountain top, in the middle of a forest. There is a road leading to it, but you need a good 4x4 car to get there(no, a BMW X6 or Audi Q7 will not get there without destroying the underbody), and between November-March you can't drive at all due to snow - to get anything up the mountain they actually use a horse-drawn sled(and the horse if nearly drowning in snow anyway).

And you know what? He has electricity,and internet, and fresh water. He managed to convince the utility company to lie down cables all the way to his house, and uses a well for water. He has house insurance. As for roof/maintenance problems - he just brings the workers up in his own car during the summer. He even gets post(in the summer, but the postman is a seasoned hiker) and has an actual address.

Compared to this, I think owning a boat is actually less trouble.