I will echo the others - GNet the largest throat quilting machine you can afford and the biggest frame 'yiu can fir in your space and afford.
I started out with a H Q 16 and PCQuilter, used. Loved it, but PCQuilter wasn't being supported as it had been in the past and my computer it ran with was fading fast. I wanted another HQ machine with computerized quilting, but the cost stopped me. I looked at Q'niques and wound up buying a Q'nique 21 with QCT Beginnings 5 years ago, I've only had one problem with it - timing went out. Grace support worked with my husband and we got it working again.
Look for used quilt set ups in your area. You can usually try before you buy, which is good.
I have a friend who bou h t a used Innova and loves it, too.