Back to why I was considering the right side for the expansion, the curb is already cut for it, and 10' goes right to where the up slope begins on the sidewalk. That photoshop ( while it's great!
) is way too far to the right.
And if I did pursue that side, I'd get blue stake out to see exactly where the water into my house goes.
I'll be shelving the driveway job till later. Need to focus on garage and shed.