I have been wanting a design wall for such a long time. Finally, my husband helped me construct one. I needed one that was movable, light weight, large, but could be folded for storage since the room where I quilt is also a guest room that is used several times a year. So here is what we came up with.
We used 3 pieces of 2 inch thick styrofoam insulation that were 2 feet by 8 feet. We cut about 4 inches from the 8 foot length so that it could fit under the 8 foot ceilings in the room. He hinged the pieces with duct tape so that the pieces fold accordian style when I want to store the wall. Then I covered the styrofoam with flannel. I fastened the flannel so that it can be taken off when the wall is folded and lo and behold I have a design wall that is 6 feet wide by 92 inches high. It can be moved to any place in the room as long as it has a wall to lean on. I won't have to move it often, but at least I know I can. It could be put in the closet or even tucked into a corner if need be. The whole thing cost under $75 - much less than some of the large ones that I have seen advertised and it took us less than 2 hours including the time to drive to Lowes for the insulation board and Walmart for the flannel.