I would set mine up like a big kitchen with an island(cutting table) that has electrical outlets. One counter area that is designated to other crafts. The dining area (for the longarm). A little nook with a side table to sit down and relax. One end of the counter area could be for a microwave, small sink and fridge, like they used to have for efficiency apartments. The cupboards area could keep the supplies needed for those certain designated areas. Maybe have a nice little deck or porch to be able to step outside. And yes windows to let the light in and the sometimes gentle breezes. Everyone knows that even on a rainy day if the windows are open it brightens the day. Floors of tile with a semigloss shine that always look clean if all you have time is a lick and a promise with a Swiffer. A design closet that serves a multi-purpose that can display multiple designs on the inside of the doors and those racks that swing out hold multiples. Then at the end of the day if you "need" to run an errand/s you can shut the doors. The library end would be next to the area reading nook and would consist of books and dvds, or cds and your computer.