I think this is going to be a difficult one! We are talking about a house of up to 100 tiles, right?
I don't remember seeing any with space for up to 3-4 kids, but I'd take a look at this topic, as there are many different houses there: https://forums.thesims.com/en_US/discussion/comment/17398551#Comment_17398551 . You might find one that suits your needs, or one with free space to add a few beds.
Comments
I don't remember seeing any with space for up to 3-4 kids, but I'd take a look at this topic, as there are many different houses there: https://forums.thesims.com/en_US/discussion/comment/17398551#Comment_17398551 . You might find one that suits your needs, or one with free space to add a few beds.