Why do you think that you need to research the market? Every business needs someone to clean. If you want to work, then you get your name out there by travelling by foot to meet potential clients in person and also advertise your business.
You go and ask potential clients personally bringing with you a some business cards and also a paper which describes the services that you offer as well as some of the fees. You can do free advertising on the Internet. Please see the following link for that.
http://www.askmehelpdesk.com/music/m...ng-103010.html
Also, two very excellent online resources from which to find information when you are first starting out in your small business are
http://www.sba.gov/ and
SCORE "Counselors to America's Small Business"
Another thing that you might want to do, is type the word cleaner and/or cleaning in the search box at the top of this page. When you do, you will find that there have been lots of questions and also answers, concerning people who provide cleaning services for others. Lots of things are discussed on the links.