@Rhiannon58 - The tools to arrange Rotational Play are within NRaas StoryProgression. The first decision is whether there will be one group of sims in town who get played rotationally while the rest are left up to SP to move their lives forward, or whether every household in the entire town is to be under your control in turns. As I've already mentioned, I play the first way because my worlds have far too many households in them for me to want to ever play all of them.
So for the entire town, a modified version of the strategy outlined in Option One here, or perhaps consider Sarah's Option Two. Instead of doing up a custom caste for Rotational households, you could use the built-in Not Active caste to make the protections you choose to put into place while families are not being controlled happen more automatically upon switching households. Five sim days is a bit short for a rotation, I find that I lose momentum for longer-term goals when my rotations are shorter than two sim weeks. It also depends on how long the life spans are to be. In the mid to high hundreds or thousands, five sim days is almost nothing as a percentage of each sim's life. With shorter lifespans, the five sim day period is a more significant part of each sim's life. But that's more a matter of strategy and player preference than anything technical.
https://www.nraas.net/community/Story-Progression-Rotational-Caste-Settings
What you might want to do first though is experiment with SP, with its progression enabled, on default settings in a test game, so you get a sense of how the mod works without the Rotational Play element. This is all considered an intermediate to somewhat more advanced application of the mod's feature set. I would also say that SP is not the easiest mod to become accustomed to if one has never used mods before. You might want to consider starting with MasterController, which actually on its own doesn't do anything to or for the game other than provide its collections of menu commands on sims, lots, and City Hall for the player to use on demand as they wish. SP is more like set it up and then watch it take over and see what happens (or in the case of rotational control, what doesn't happen).