Going Green

So im in the process of rebuilding my business and have decided to offer house and office cleaning, all around cleaning, we will do carpets, general cleaning, dryer vent, chimney sweeping, mattress sanitizing, air duct cleaning, pressure washing and more.  We are going green using only environmently friendly cleaning suppys. To my suprise no one here does this. Anyway i have a few questions about cleaning supplys.  What is better Ecogent of DFC for high flow extraction carpet cleaning?  Will be buying either a steamin demon or the Parish high flow machine which appears by all means to be the same machine as steamin demon but a grand cheaper. I think green is the way to go anymore.  I never considered it till i moved into a  house that had the carpets cleaned and have since had a reaction to what ever cleaner was used. You can smell it in the carpets and it took forever for the carpets to dry.  Another reason im wanting to go hight flow for better rinsing of carpets.  Any suggestion would be great, thanks brian.