I like the idea of owning a tower of some sort. A lighthouse qualifies as one type of tower.

I envy Vita Sackville-West of her Elizabethan tower, at Sissinghurst. She did her writing there. If I understand correctly, the furniture in her study there had to be built on-site, because the spiral staircase was too narrow to carry it up. She could afford it.

I once knew a guy who had bought some land that contained a free-standing silo. The barn had been torn down. He was planning to convert the silo to a cabin. I lost touch with him and never learned how the plan turned out. But I had fun visualizing how it might work.

A room in an old wooden water tower might be fun, but of course you'd have to cut some windows.

An uncle of mine had a fire tower on his land, and my cousin's wife worked as the fire warden during periods of high fire danger. I got to visit the little room at the top once, and several other times I climbed the stairs although the room was locked. That was cool.

A house with a cupola would be nice, too.

If I owned a caboose, I think I'd spend a lot of time in the little room at the top.