Gothic, and goth clubs are NOT the same thing...I hope you realize that...Romania is a poor country, at this time, and that makes it an inexpensive place to visit. Yes, Bram Stoker was inspired by Vlad the Impaler, (though I'm pretty sure, he was never there - he did it all on heresay). Vlad's castle still stands and is a big tourist attraction...I absolutely HAVE to go there someday, myself!
Yes, I think Romania would be a GREAT place to go, though I'm not sure about any other mansions and haunted places. Vlad's castle is supposed to be haunted. If you want lots of hauntings, go to England and Scotland! Lots of castles, lots of haunted places. Do both while you are young and can travel a lot! Have fun! You'll be telling stories for years to come.