@unknownuser said:

I use a hybrid system. I generate plans in a CAD software. Import that into SU for model generation and development of the buildings fenestration and roof lines. I then export the elevations back to my Cad software for CD completion. Idea 1 would be very useful for me. As would 3. I really don't do much as far as take-offs so 2 wouldn't be helpful for my uses.