If i wanted a quilt machine then i would go get an industrial machine that comes with a long throat...there are many used ones around for good prices and the main thing for quilting is no foot or a quilting foot, putting the presser handle down and doing your own magic stitching.... this type of machine could use the Flynn frame easily but you don't have to have a frame.... if you want the fancy stitches, then that's a different thing...
... take a little sample sandwich to a used machine store and play ... see what you think.... DON'T forget to put the presser lever down....good luck....