Love this, and I can just hear him telling you that! He has a quick wit anyhow..........
I LOVE the idea of an outside sewing place. Wouldn't it be wonderful to have space for all our stuff and still have room enough to turn around in! (SIGH)! I took over the smallest bedroom in the house and put enough equipment, etc. in it to furnish a warehouse.
Ask him to floor in your deck, and put window walls around. You would be set! Perhaps I could move in there too!