Bobby,
I am a die hard tradder (hopefully not in a future literal sense). I am 49 years of age with nearly 15 years experience in this game. I have lots of room in my work schedule at the moment due to starting up again in another country. Moreover, I am very, very careful and methodical in the way I go about my work.
Given those simple facts and my current circumstances, I would still not touch a job like this with a dozen bargepoles tied together. The reason being that it is patently unsafe working 50 feet up in the air off ladders. My limit is around 25 feet, and even then I have to feel safe when I am up there. Anything higher than this I reject or pass on.
Some jobs are simply not worth the risk, and as you have a full book, why do you need it in the first place? Rhetorical question.
I wish you the very best in whatever you decide to do.

John