The haunt I work at is on a Christmas Tree farm, owned by the same people. The next nearest big haunt is about a 30 min away, in another state. That one is in a building that I would assume they own since they have permanent signs and have been there for more than 10 years. There is also some corn mazes and school gym haunts around. I have never really seen a haunt in an unused building although every year the Spirit Halloween Store seems to be in a different location.