David, wasn't putting down your business name just claryfing, I quite like it.

Why not start with Window Cleaning Service (or whatever)"
Then bullet points
Then Contact WindowPro on......... and speak to David.....also give times of "office" opening/closing following with answering service for out of hours calls. This then gets your customers used to the fact straightaway that you are not at their beck and call 24/7

Keep it simple and straight to the point, either they will call you or not, when you get the calls and go round to quote, that is the time then to expand the details and sell yourself along with your service.