My company uses dry extraction for most of our work, but we also have bonnet equipment which we use for low profile carpets such as in schools and offices, and Hot water extraction for extreme conditions.
As regards pricing, it is a non starter to be the cheapest, as people expect a cheap job. My company always bases prices on the service we give, which allows us to charge £70-80 for a lounge/diner and £50-60 for a standard lounge, for example. Never be a busy fool, but concentrate on selling the best service to customers.
It is important to build an image for a company and this can be done quite cheaply, requiring the application of common sense and some effort .
After 15 years in the carpet cleaning industry, apart for a few weeks when I started the business, my company has never been short of work.
I am quite happy to pass on the benifit of my experience to anyone who wants to develop a sound carpet cleaning business.