Scott's right on the money on that roof. Crop that pic.
And I'll make my Phone number much more visible, that's as far as design goes.
I don't know if you are going to have a lot of return with that coupon, the idea is good and I get it, but is probably best to focus that coupon per household and let the neighbors peek while you work and answer their questions, sell yourself.
hope it works good one way or the other
Carlos