I had the same problem. It was getting to hard to quilt large quilts on my regular sewing machine so I acquired my system in pieces. I went through
http://www.sewvacdirect.com/. First I bought my Juki machine. The larger throat helped a lot. The next year I bought a Grace frame. Even more help. This year I bought a stitch regulator and I love my system. I couldn't have afforded to buy it all at once but doing it this way worked for me.