why I only clean vinyl windows

I've been cleaning windows for over 15 years and I've cleaned every type of window possible, from vinyl windows, wood casement windows, metal casement windows, aluminum casement windows, French windows, plastic windows, windows incased in cement and different other specialty windows,
those days are over! I put my foot down about a year ago and decided only to clean predictable vinyl windows, which makes up about 95% of the market and produces about 10% of the effort,
you start spending 80% of your time on these crappy little 5% special designer windows and your profits are going to plummet!

[@kidilantraveler]

Your videos really inspired me.
I saw many of your videos.
I would like to start window cleaning work independently.