So that you can go beyond the limits of 8 sims in your home, you can use this mod for the TwisterMexi simmer.
You can adapt the rules as needed, reducing the number of children (you can start with 7 and then increase the difficulty), however, it is important to remember that having 100 sims in a space will require a good performance from your machine! The original idea was born from simmer Amiisays for the second version of the game and has been updated by simmer Snarky Witch, who created the rules for the challenge of babies. Challenge your patience in the 100 Baby Challenge in The Sims 4 So, let's know the rules of this challenge for your sim and for you. The idea grew out of the original challenge and was taken to the extreme by some hardcore simmers.
Your sim, alone, taking care of a bunch of kids and taking them from childhood to adulthood, being healthy, well-bred kids, not letting social services take them. Now imagine multiplying all that work by 7, by 30, by 100? That's the idea of 100 Baby Challenge in The Sims 4. You might be playing with a kid and a second later, he might be crying or throwing a tantrum and that skill that you were evolving so well went into space. Just like any other sim, children, babies and newborns have their wants and needs. Taking care of a child in The Sims 4 isn't exactly the hardest thing in the world, although it's not the easiest either.
