Definitely a cherry picker as well as a chainsaw, loper, hand snipper, giant root rake, humongous planting pot and a giant plant mister.
Lots of people use bonsai to grow miniature trees and that's fair enough but I want to grow a giant bonsai. Would I need a cherry picker or would a ladder be good enough to get up into the branches? What other tools would I need?
Probably will depend on how tall you want this thing to be.
A local garden centre advertised a "Massive Bonsai sale" last year.
So just trees then?
Here's a site for "macro bonsai" olive trees that should give you some ideas: