If you can afford it, the best ways to get both vampires are the $100 Vampyre Castle or the $180 Haunted House. The choice is largely which you can afford, whether you want any of the Monster Fighters themselves, and whether you want your vampire abode to be more like Castlevania or more like a Munsters/Addams Family house.

You can get Lord Vampyre in the $35 Vampyre Hearse as well, but that doesn't include his bride, or any exclusive minifigures for that matter.

Or you can do the expensive way and just scower eBay for the minifigures and possibly find a good deal on them.