Suggestion: make maids either stay within 5 floors of where they are placed. Perhaps create a service room where you place maids in and they then go about cleaning and on that floor and +/- several foors
Also, make a hat that gives more money per fastbar fill up. There's also a grammatical error in catching goldfish. It should be "swam" not "swum." Don't know if that one's intentional :P
Swum is a word to English people :D