Here's a shot of the back of the shop showing the proximity to the house.Your post doesn't need a reply, but I felt my laughing out loud emoticon needed a bit more lest it be interpreted as laughing at a stupid idea - which it is not.
Out of the mouth's of babes they say. Cool idea! So what would you put up there?
Imagine a foot bridge going up a couple of steps from the house stairs then across to the roof.
It would be a small shed, maybe 6'x6' basically above the door away and from the power lines. The roof has 2x8 rafters on a 10ft span so plenty strong.
I'd be able to store all of my seldom used tools like my tile saw, Black and Decker saw horse things. If I got brave I could put my compressor or dust collector up there...