i feel your pain, literally!
every time i think of doing some project that would take a normal person an hour, it takes me four, and for every job that is a strenuous 4 hours puts me out of commission for up to a week.
i really never understood real pain, till the last couple years.
when asked to explain it, i relate it as a hard kick in the balls, coupled with a poke in the eye, and a throbbing toothache combined... and it doesn't go away.
not that i have any intentions of doing myself in, i do have an understanding now for those that are pushed to that extreme to escape what is no longer treatable.
you might consider a counterbalanced tilt up tower, something like a catapult.
that might get you up to more than 10 ft and be easy to lower and erect?
bob g