"what do you when you can't squueze a ladder in like that?"
Scaffolding rental! T&M for pick-up, actual site set-up, and work, and drop-off time. Thats the best way IMO. Shop I used to work for charged special rates for the company owned scoffolding if that was useable. If not, the rental charges for what-ever was needed, plus time for set-up and removal.
