So the rent events are just purely random? (minor spoilers)
As far as I can tell, things like lease break and tenant revolt have nothing to do with apartment conditions, rent, stats, or anything else, but are just one of many random drama nodes that are mixed in with electrical failures, infestations, etc. In other words, if you have events turned on, your tenants will revolt and break their lease from time to time no matter how well you treat them. And treating them worse probably does nothing to increase the odds, either. I think all the stars do is adjust how much rent you can charge. I hope I'm wrong, but looking at how they're programmed to happen I don't see any other possibility. Kind of a lame and lazy way to approach it.
