Need 12' ladder on second floor but staircase is too tight
I'd look at renting a tall-ish scaffold set - something like:

When I'm standing that far off the floor in the middle of a room and wanting to be able to use both of my hands (as I would do when replacing a ceiling fan), I'd like a wide, firm base to stand on.
As long as you can get the individual pieces into the room you want to use it, you assemble it there.