Personally think you get enough warning already.

30 days of inactivity: A notification indicating that the estate is being prepared for auto-demolition will appear in the Timers interface in the Duty tab of the Main Menu.

35 days of inactivity: An e-mail will be delivered to the registered e-mail addresses of all free company members, or the owner of a private estate, indicating the estate is being prepared for auto-demolition.

42 days of inactivity: An e-mail will be delivered to the registered e-mail addresses of all free company members, or the owner of a private estate, indicating that the estate will be demolished automatically in three days.

45 days of inactivity: The estate will be automatically demolished.