A local girl here started a FB page. A few friends shared her page and said that she was good at what she did and BOOM! Her days are full. I think that could possibly be a great avenue for you to explore.
Also think about apart from having regulars- can you set aside a few hours per week to do exit cleans on rentals? If so, go around and see your local real estates so they can pass your details on to leaving clients. I would DEFINITELY pay good money for an excellent exit clean on this house when we leave. Moving is stressful enough without having to worry about every smudge and smear.