some people will let their single biggest investment (their house) go to crap....
I see it all the time as a realtor, but still never get over it. It's just throwing money out the window.
Also, landlords who don't watch their tenants, and don't see their investments getting trashed. I looked at a $700k + property this week that was getting thrashed by the tenants and their monster dog in the backyard. :hammerhea