In centuries past in the US, it was fairly common for large quilting frames to be hung from the ceiling. They were lowered on a pulley system for use, and raised up to ceiling height when the room was used for daily life. Could you rig up a larger work surface in a similar manner, to lower only when needed? If you have a ceiling light that would be a problem, cut a hole in the middle of the work surface for the light fixture to pass through, and cover the hole with a piece of cardboard when you lay out a quilt.