I don't know if this will help, but there are a couple videos on Youtube that show how to build a quilting table using inexpensive materials. Essentially what happens is your machine is set into a piece of foam insulation material so that the throat of the machine is the same level as the piece of foam, giving you a large surface to support your quilt while you are quilting it. You can make this set up on an inexpensive folding table and I think it really works.
glo