Do you need a ladder to start a window cleaning company

I bought one of my ladders from a pawn shop. They are about half price. Plus you see condition of item right then. I have 4 foot, 8 foot, and 24 extension. Also have acess to 14 foot step ladder for when I clean light fixtures. I have a wfp system and still need my ladders on occasion.

I have a Little Giant ladder and find it works very well for many jobs. I would recommend getting a standoff accessory too. Does anyone here use the aluminum sectional/stacking ladders?