I am in the process of having one built.
The way i see it is, if you cover every possible way of attracting customers, you cant really go wrong.
All my customers will be told about my site, and possibly when surfing they will have a look, and realise that i do other services they can take advantage off!
I was against getting a site untill customers and future custies actually asked me if i had one or if they can pay online!!!
I also have 5k leaflets a month going out this year, advertising my conservatory cleaning and window cleaning, and im sure when custies see before and after pics, they will be interested in calling for a quote!
My next step will be yellow pages, although a lot on here have negative feedback on it, i will prob try it, if just to rule it out in future.
This is my 3rd year, and for the record, my whole business has been built solely on leaflets, van sign written and recommendations and i am now getting near to needing to employ!!
If your not up to capacity as yet, i would spend your money on leaflets, then concentrate on a site!