I wish there was a career track to become a maid (or professional cleaner, of something or other) because I would literally create a Sim and invest my time in him/her to build up their career so I could turn around and hire them to clean my other Sim(s) house(s).
These "maids" (I use that term very loosely) in The Sims 4 are beyond useless. The first maid I hired showed up at like 3:30 in the afternoon the first day, went upstairs to my study, picked up a book and sat down and read for like an hour and then left, charging me some random amount of money for their "time". So, I cancelled that maid and hired another daily maid service, hoping a new maid would show up. Surprise! Nope! Same guy shows up. Oh, and I should note, while on the phone they said "thanks, someone will be by in 20 minutes", about 4 hours later the maid showed up, walked into my house, took a dirty plate out of the fridge, put in on the floor, and walked back out of the house (and charged me $182 on their way out!!!). So once again, I cancelled the service. I set up a 3rd service, this Maid was "okay", not as atrocious as the other two at least, he cleaned things once and a while anyway (and once again, its the same character as before, Sheldon something-or-other) but he doesn't show up every day... He shows up like every 2 or 3 days, regardless of my Sim's schedules and regardless of the fact that I asked for a DAILY service.
Needless to say, I've given up on maids. I very recently got the "City Life" expansion pack though... not sure if these Maids might be any better or different... Maybe I'll try when my new City Sim can actually afford one