I like my Voyager 17/Stretch Hinterberg frame setup. It's a good combo for a beginning frame quilter. Mine has 10-foot rollers which is pretty standard since these are the easiest to purchase from a big box store. To make it smaller, all you do is purchase shorter rollers and switch them out. Places to look are:
http://www.hinterberg.com ($4,000 for a refurbed Voyager with stitch regulator and frame)
http://www.houseofhanson.com/formerlyowned.html
http://www.longarmuniversity.com/machines_for_sale.htm
There is also a nice Yahoo group called HinterbergQuilters where you can find fellow owners offering info and support.