Midwest,
If your going to go with the folding ladders, I would opt for the 22 ft. Although it may be heavier, and more expensive, you'll apppreciate the extra 5 feet when you need it. Have you thought of getting a different vehicle? Cleaning residential windows out of a Civic can be done, but a truck or van would give a better appearance to the customer. Sometimes finances will not allow for a different vehicle when just starting, I know. I would suggest starting with store fronts. Store front accounts are easier to attain, in my opinion. You won't need a ladder, just a 8 and 12 pole. Hardly anybody will notice your in a Civic too. Although I bet your civic could do circles around my truck... using 1/4 of the gas... You wanna trade?
Micah Kommers
We Wash Windows
www.we-wash-windows.com
South Carolina