I started cleaning residential windows three years ago and I am now slowly changing over to do only power washing.Its all about the money issue for me.In my area I started three years ago at $5.00 per window.The other companies i checked out where at these prices.I guess if all your employees are day labor for $50 a day you can do this.I just saw one company for $4.00 per window next year i guess they will be at $3.00 The only windows i touch now are houses $1 million plus thats where i can get my window prices which are much higher than $5.00 I guess in a few years those guys will get into pw but i hope to have a good customer base by then.I forsee the borders falling in all areas in time so watch out.