Nothing is impossible with enough time, money and determination, but... from what you describe, should you reassess and reconsider the work ahead of you?
I have done my fair share of cab-over nose repair and while it was a descent amount of work, I do not think it was as extensive as you describe... just saying.
if the siding is in decent shape as you state, can portions of that work be performed from the inside?
Pictures of what you are up against will help us help you... post some up so members can better assist you.
(not trying to dissuade you, but rather posting basing on just your words alone.)
