I've got a 16' and a 24' extension ladder with a stabilizer and a 6' and a 8' step ladder, there cheaper, and I can reach every residential window I come across(well 99%) and just in case I've got a 5 piece 30' extesion pole, sectional ladders are ok if you want to be real old timey and do your route on a bicycle, just keep it simple and save yourself money, just my 5 cents worth.
Gav