Poster calls it a "personal vacation residence" and the preparers here might have misinterpreted it to a part-personal, part-rent it for fewer than 15 days vacation home limitation property.

I don't know what it is, but it sounds like it might have just been a second home, not rented out(although I never heard of a 1099-E either).

Solely personal means enter all info on Sch D(or more appropriately 8949).