When I was in your shoes many, many years ago, I asked a wise old IA what he did when he ran out of ladder. He said he backed his pick-up truck up to the garage and put the ladder on the bumper. I thought that sounded like a good idea, so I backed my monster Chevy Express up to the property and lashed the base of my ladder to the roof rack. When my old boss found out what I was doing, he almost had a heart attack.
Math is tough. Let's go shopping!