Dave, very interesting, Entertaining to say the least. What I would like to highlight is the "Vibe" you have created. Warm Friendly and Inviting.
I would say you are strengthening the customer/service provider relationship every time you blog and that will only compound as time goes on. People buy People as I am sure you know
And your customers will know you as "Dave" and not the window cleaner.
Taking this into consideration I believe you are securing your customer base against the wave of new wcs.
In short It is 10 times harder to get rid of Dave than it is "that window cleaner."
Good on you, aww shucks If I werent a shiner Id call you myself.
BVC. Ipswich.