I would definitely go for a recursive island. It’s an island with a lake, that has an island.
Turns out there’s a ton of them in Finland.
There I would build my house: by a private lake, with a summer house on the private island on the private lake.
While not very humorous, some of the most useful permanent items on our shared shopping list include “That spice that ran out” and “That thing I was looking for the other day”. They’ve saved the day a few times over ten or so years.