Test everything daily unless you are my competition in which case please wait until your customers tell you something is broken.
I'd like to catch the problem with the first customer. Not the 20th a day later.
I do plan to add this to my car washes, but I wanted it for my laundromat. There's not enough time in the day to sit through the cycles of 40+ machines to make sure they're working alright.
Also, if a crackhead takes a shit on the floor I wanna know about it like RIGHT NOW