I would check around with the different brands offered and make sure which ever one you buy the dealer will provide lessons and support. I know of one quilter who purchased a longarm and had a heck of a time trying to learn how to use it. She had it for months before they sent someone to help her out. Just a thought.
I do agree if you find one that you like and learn how to use it, you will be turning out alot of quilts and saving tons of money if you can quilt it yourself. Maybe even start a quilting business once you retire.