A lightweight triple 8' set with an A frame top and the option to loose the bottom section when not needed would be my choice,.... But avoid the DIY store ladders, they just don't last. Google it a bit and you'll find some good pro suppliers.
Take note of the weight,... if you'll be using them all day it is a very big factor.
While you're googling,... sneak a peek at WFP gear,... plan for the future,....... it could save your life.