home
Look at the servo - when it begins to clean the showers, it's a hint that you have to replace the lights, esspressos, and showers, after paying the taxes; usually it does it every 3 sim days.
When the servo begins  to clean the bath tubs - you have to replace all the furniture, if you want to keep the 9-furniture rate. Usually it does it every 7-8 sim days.
TIP
lights2
lights3
lights4
lights5
lights6