My problem with butlers is that there's always a sim making a mess some where in the house, and these house are not small shacks. There are all huge mansions. Or there's always a plant or two that need watering or spraying for bugs or weeding at all hours of the day or night. So having a butler that goes to sleep isn't such a good idea in my game. But I can't keep the butlers awake 24/7 in my game because that would just lead them to walking around the houses like zombies. Just dead on their feet, and unaware of what's going on around them all the time.