Is it okay to invite Vladislaus Straud (a vampire) into the house once cured of vapirism? He has a special trait that prevents him from aging (IntroToVampire_Caller (+ Disable aging)) even when cured. There is a cheat code that can be used to remove this trait. If we remove the trait right away, is he eligible? Or is that off limits? He has some pretty fantastic genes.
Also, does buying a new expansion that has a new town and townies count as the one chance to re-seed the town? I'm thinking of starting a challenge game, and if I get into it I will probably want to purchase some additional expansions. I don't want to get locked out from adding additional content, so I'm wondering if I need to get all the ones I want that have towns before hand, or if I can just purchase them later.