You have gotten a lot of good suggestions for sure. My only addition would be to put the cutting table out away from the wall if at all possible so you can walk all the way around it if needed. That's what I just did in my new room and it has been great for me. Before I could only access one long side and one short side of the table. I love be able to leave fabric on the table that I am cutting and walk myself around to the other side when I need to cut in a different direction especially when using a large chunk of fabric.
So, congratulations and you will definitely love your new "just for you" room. Nice that your husband thought of you this way.