I would rather set up a bed in my kitchen and say this is my guest room and kitchen combined then having my sewing room shared with guests. My sewing room is my room. If no one else shares their room with a guest room, I'm not either. I'm me selfish that way.
My tips to organizing won't help much. I organize my sewing room constantly and it never stays that way. For one thing I have too much stash and I want to see it all to know what I have. DH says why not let the LQS keep your stash as in what they sell, and you go there and get it when you need it? He doesn't understand stash.