The location where the key is expected to be dropped off. This is used to communicate to a user where they should drop the key off, and should not be confused with the currentLocation property, which is read-only and can only be modified by a drop off. A drop off will also update the key's home location to the most recent drop off location, and this property may only be set while the key is checked out. Only the ID property is necessary to set a home location.