Dr. Glass window washing business?

[windshield]

Hello!What about the complete Dr. Glass DVDs and Manuals $3000 window washing training business?This is a good windshield repair ad on?This is a really good business?When you see business opportunities magazines that business run a complete ad page.I live in a city where they dont have many buildings with large windows like many US states.Some one out there run this kind of business with sucess?Thanks for the attention.

[cleanerimage]

My neighbor does it himself and does about $150k a year, residential only