My local Husqvarna Viking dealer has something similar here. He has the QBot for customers to use after taking the training for $120. I'm not sure what the hourly rental free is but I think it is about the same as the price you were quoted.
I'm intrigued by this as well. I just wonder how long it would take me to learn how to do the quilting to my satisfaction. I think I would do a practice piece before attempting a quilt.
If you go ahead and do this, will you please report back to us on your experience. I am very curious to find out if it is easier than you thought.