Kathy is dead on, 9" throat means even less space for quilting as the take up roller takes up a couple inches right from the get go and only gets smaller as you roll the quilt up. Most people who have this kind of set up have to take the quilt off and flip it half way through quilting.
I would pass on this set up. Don't consider anything less than 16" preferably more. My LA has a 26" throat.
Edited to add this is not a LA, but a domestic size machine mounted on a rack.
Anything less than an 18" throat is considered a midarm
Anything 18" or over is a longarm.