I've helped four separate people into carpet cleaning, one did the dirty, but only lasted about six months, the others have all done pretty well and had no effect on my trading whatsoever, in fact I have passed on work when unable to do it myself and would be happy to include them in anything big that might come along.
I rarely come across another c/c when out and about and this has been the case for over 20 years.
It's a big market !