I wouldn't clean apartments on a bet. I tried it once, gave it up after a couple of months. Too much work, too little profit. I used to charge (if I remember correctly) $50, 60 and 75, which almost doubled the bid from thier last cleaner. I still couldn't make squat. You have to be able to play the game, what I mean is charge for every spot. If there is no spots or stains, then you must stick to the base price. Get it done fast and move on to the next. There are definitely easier ways to make money.