So, can the Wainwrights be the founders? Cuz they have a daughter living away? Or can they be the founders only if you kill Blair before the birth of her much younger sibling? (Or any family structured the same way, with two parents and their childs live away)
What about the Clavells? Maybe you can start with Xander b\c the rules said nothing about parents living with the founder... But what about Ransom and Jennie, the drowned ghosts? You send Bessie or Agnes or anyone to the cemetery, and use testingcheatsenabled to add both Ransom and Jennie to the household, and then you kick them out to be neighbors or something?
What if you play with another family for a bit, like playing with the Clavell family until Buster and Bessie are both dead, then you exterminate Xander from Sunset Valley, and go playing with Agnes Crumplebottom that goes to marry VJ because he is now 1 day from turning into an YA?