You could set up a Pinterest Board and collect pics of sewing rooms, quilt studios, fabric storage, design walls, etc. The website houzz.com has a huge catalog of home photos with a great search engine, you can set up an IdeaBook there to collect ideas, too.
Even though I have lots of ideas, I don't have the space or the $$ have a large sewing space now, but I'll be ready if I suddenly find myself with more!