I just finished my first rotation on my current save and saw that I have played 42 households! It got me wondering how many households other people play (per saved game).
Further to my answer....It's not the number of households but the number of Sims allowed that I go by so there may be less households but at the limit of my recommended number. It was 250 Sims that I've rotated around but now, with my new laptop it is set at unlimited. I probably will go over the 100 households soon. :)