Nettie, have you considered MQR as it can be added to just about any machine from a 9" to a 26" or larger I suspect. I started out with the PCQ, then moved to the PCQ retrofitted MQR and now have the big MQR for my 26". Have never regretted the move. It seems to be less expensive than others I've checked out and I have great Customer Service with it too.
machinequiltingrobot.com/MQR_Longarm.htm