CJCowl and CJtinkle both have excellent advice.
I just recently purchased an ABM Innova 26". I am very fortunate that the dealer is only about 50 to 60 miles away. It was only installed last Sunday so I have not had a lot of time on it and have had no occasion to need tech support. I had the luxury of the dealer coming to set it all up for me. I know that would have been nightmarish for me to do on my own even with DH help. What took the dealer a couple of hours would have taken us days. The dealer then gave me a quick crash course for loading quilt top backing and batting, threading the machine, adjusting tension, changing bobbin, oiling and cleaning bobbin area, advancing and backing up the quilt on the poles, playing with templates and pantos. A good dealer is worth their weight in gold.
The innova is built to commercial specs but priced about the same as an HQ. They have a very easy quick learning curve and no need to adjust height on the take up pole. They only need to be oiled in the bobbin race area. So they are very user friendly machines. They are available in 18" and 26" and I believe they just came out with a size in between, I think 22" but not positive. Even so the 18" plus frame and stitch regulator will still run you darn close to $10K when you figure in any applicable sales tax and shipping from the factory in Texas.
All reviews I could find on this machine are positive. ABM has 24-7 tech support on the phone. I love my new machine and can't wait to really put it through its paces.