I just watched a two hour show on vampires this weekend. It mentioned Prince Vlad’s reputation for torturing his enemies as one of the things that inspired the Dracula story. The prince impaled thousands on stakes set up in the area he was supposed to protect; apparently it was an effective deterrent against foreign invaders. (The blood-sucking aspect of the Dracula character came from a Hungarian noblewoman’s sick lust for the blood of young women; she used it to try to preserve her own youthful looks.) The show didn’t say anything about the castle, but the tourism industry in Romania makes tons of money off of the Dracula legend. I imagine anyone owning the castle would make money from tourism too, if they could afford the cost of its upkeep.
I think it would be a fun place to visit, but I wouldn’t want to live there.