Bwahahaha! That is a TON of sims!
When I add sims to my game (that I know I won't be playing often) I usually replace one of the townies I find unappealing. I go to the townie household, say "edit household", drop in the sims I want to add (often off the gallery), then delete the original townie sim. Then, I save the changes. It'll put this family in my played households list, but I just click the icon and put them back into the unplayed section. Voila! I get to see the cool sims around town and getting jobs and my actual played households stays down in size. (I think I've got about 6?)
