That is a beautiful space. I see lots of light coming in from the right side window. I would put my main work space there. near the window. Put two track lights with plenty of natural chromolux bulbs, in the heads. Good storage on one side nice and clean simple along the lower walls. Cubboard to keep the mess at bay. A wonderful book shelf and a huge cutting and work table. Plus a really comfortable chair or two, opposite a design wall so you can sit there and dream up what to do next, read books for inspiration and invite friends in for tea and coffee. Yep that is what I would do with it. And paint it a nice white with pinkish undertones so it always feels like sunset. Ceiling and walls all the same. And the floor hard wood, light or natural stained. A really great looking happy patterned area rug near the chairs and an end table.