Two ideas. When I was fulltiming in a motorhome, I used a screen tent with a rainfly over the picnic table as my sewing room. We usually parked in one spot for 2-3 months at a time. My combination cutting/ironing board was a bi-fold closet door set up on adjustable height sawhorses. That even provided some storage underneath on a shelf. Now that I'm in a house, my cutting table is two kitchen upper cabinets (resale store) put back to back with the doors taken off, tied together top and bottom with pieces of plywood and mounted on castors. My ironing table is a 2' X 52" piece of padded plywood mounted to the top of another resale kitchen upper cabinet and also on castors. Works well and I find I don't need to use the locking mechanisms on a carpeted floor.