Have you checked out The Quilted Hill in Yamhill? Bobbie has the machine in her shop where you can watch her quilt. It's such a cute shop and the view !!! -worth the drive just for that!
http://mysite.ncnetwork.net/res6z38p/index.html
Sharon's Attic in Hillsboro has a class you can take and then you rent the longarm machine to quilt it yourself. Steve is good about helping. That might be an option for you too.
http://www.sharonsatticquiltshop.com/longarm.html