That's exciting! Congratulations. I would recommend making your services known to the agents in your area so that when they need a cleaning business, you are on the top of their minds.
You may want to just start off by emailing them directly introducing yourself. Alternatively, you can set up alerts on Trulia.
Here is a directory of agents in your area: http://www.trulia.com/voices/directory/
Good luck! Please reach out if you have additional questions.
Ali, Community Manager