We spent nearly 6 years in a 5th wheel. I only had one dog and no kids but I set up a small folding table in the back window and a plastic 3-drawer bin beneath it. All my "stuff" went in the bin. The two easy chairs were kept on the floor and my table went behind them so we could still watch TV. The machine stayed on the table when we were parked somewhere. I had an Ott task lamp for lighting, which can be folded up when not in use. I had a long kitchen counter that I could lay a smaller cutting mat on. When it and rulers were not in use, they were put in under the bed storage. It can be done, it is crowded but like you, sewing was my therapy. You can only work on one project at a time, usually. Because we did a lot of hosting for Oregon state parks, I did a lot of mending for other park hosts who had no access to a sewing machine.