I think it's difficult to have zero attachment to a property you paid for and you probably worked in and maintained. I never lived in my rental property. Each time a tenant left and I discovered issues except with one tenant, and each time I am annoyed and have to spend a couple of weeks working in it. I think the removal of furniture warrant a letter to inform them that you expect them to replace the items before leaving and that no further items should be removed without permission as well as an inspection. Furniture needs to be replaced over time. However I would not expect to have to replace a bedframe on a regular basis. At the end of the day, they were yours not theirs and most people would see that. If they didn't want the bed, they could have informed you and you could have taken the decision to store it. Of course rental is a business and there are worst things that can happen to a landlord. But as a business, you try to limit your expenses as much as you can.