Yes, Dracula lived in a castle because he was a landlord. But all classic vampires in literature are in a sense. Originally, in oral history and folk takes, vampires were more about fear of sickness and about not understanding how diseases spread. But later, literary Vampires were a standin for the universal experience of how landlords are bloodsucking pests. Take Dracula: the protagonist is a solicitor who comes to Transylvania to help the vampire buy land and various properties in England. Then the plot revolves around preventing his moving to England, but the heroes fail at that, because he has prepared to well, is just too rich and has filled out all the legal paperwork.