I don't have an extra living room. I have one living room, 3 bedrooms and 2 baths. I agree with Nike. JUST DO IT!!! LOL Since it seems to be an extra room that is not being used, you could rehome your sewing stuff. It would all be in one location. If it has an open entryway, you could make long curtains to close it off when not in there (or to hide a mess). LOL LOL LOL Good luck with your decision. Please if possible would you post some pics when its done.
debra