I like to move the elders back in with their kids so they can provide free childcare. I build them their own studio apartment behind the house or above the garage. Grandma and/or grandpa can watch the kids, do all the cooking and cleaning, and in their spare time, can write and paint to generate income. This way, I can still keep them aging, and eventually they'll pass on and I can reduce my population. And better yet, it saves the parents all the money they would have spent on nannies, maids and gardeners.
And my Pleasantview is also a little eerie. Each mother only gives birth to twins (I use random trips/quads), always one boy and one girl. And without fail, they are always blonde haired, blue eyed, regardless of the parents genetics. Brandi can easily populate the town if you let her. I once let her marry Don Lothario. It was the only time she ever had girls, but they also always came as trips or quads. Not one single birth during the whole marriage. I achieved the have 10 kids want real quick though