roller coaster
I already have a scaffolding like
http://u.lasoo.com.au/Content/Images/UserStories/22764ef9-7dba-455a-b0db-da6530bdc6cd_1694955339.jpg with anti-fall security bars and everything, but it only gives you a couple yards of reach, one way only, and then you have to reposition it, not to mention that it is also a sort of ladder but much more bulky...
Stilts are out of question, I saw them on YouTube, but... I also saw a wonderful and funny idea swapping around: one guy attached a pair of shoes to the bottom of two plastic 5 gallon empty paint pails, obviously up side down, and that's it!
Funny when you walk, like stilts, but much more stables, secure and easy to wear, just like putting on a pair of shoes. I'm now figuring out how to attach the shoes to the pails...