If you don't have room for a frame, you could also try the sit down models. With those, you move the quilt, just like you would do with a domestic machine, but they have a much larger throat so you can more easily fit larger quilts in them.
I quilt all my quilts on a Brother PQ1500s and have successfully quilted up to a queen size with it, but it is not on a frame, I use it as a sit down, like a domestic machine.
Like others have already mentioned, I strongly recommend that you spend some time trying out different machines. For frame quilting, you will need to learn how to load the quilt on the frame, and if it's one of the larger machines- either a true long arm (over 18" throat) or a mid arm (under 18" throat), you will probably need to be willing to do some basic maintenance like adjusting timing, needle bar height etc. rather than trying to haul them to a repair tech. The same will likely be true for the sit down machines like the HQ Sweet Sixteen.
Rob
Last edited by rryder; 09-14-2017 at 07:50 AM.