sims 3 or sims 4

Just to add regarding the prior post: if you use mods with Sims3, you can at any time just switch between households with a simple right-click on any of the hundreds of sims in the city, play them for a bit, buy stuff for them, rebuild their houses, then right-click on a member of your original household again and continue with that one. I think quite a few Sims3 players play the whole town (or at least some subset) at once this way. It's not perfect, as some of the LTR's may not be active in families that you don't play at the moment, but it works well enough.