I feel like my answer was too brief so whatever it's worth....here's my advise. Call around and get pricing you'd be surprised how cheap you can get a carpet cleaner. If he says he doesn't use soap tell him to shake the container and prove it. Soap and detergents are really cheap. He should be a green company. No residue =clean carpet. A good carpet cleaner is worth the price of his unit..without extraction, heat, and knowledge he is just an ordinary Joe. Believe me there are tons of them out there, too. Unfortuately the industry is flooded with guys trying to make a quick buck. Keep in mind its a low cost cheap start up price that attracts all sorts. Don't allow anyone to dump their tanks on your streets, and go to the IICRC website and find certified cleaners in your area then shop them..
Hope that helps.
at 6:02 PM on Apr. 17, 2011