I have a small space for quilting also, the size of a card table, but I made it bigger by getting a large piece of plexiglass and putting that on top of it. Since the card type table has a place cut out for my machine to fit into, (a 1914 red eye), I placed the plexiglass OVER the base of my machine and cut out the place where the needle etc go through. I am very happy with the space and the plexiglass is thick enough (1/8 inch) that it doesn't bend. I think that you can get it in 1/4 inch also. I bought it at the True Value Hardware in my town. and paid about $23 for it.
Just thought this might help.