Janome sells a 15000 sewing /embroidery machine that has a hoop (a little over 8 x 8) that is built to quilt your quilt with machine embroidery (continuous line designs work best). It uses magnets to hold the fabric on the hoop. I have used it for a King size quilt and won a 1st place ribbon in my local show and then was accepted to display it at the Houston Quilt Festival. It took patience to quilt the whole quilt, but well worth it.
Best of luck!