Not sure if you are still looking, but I think you need to find a local (my local dealer is 75 mile round trip) dealer...one as close as you can get.
Service is the first thing to find out about. You WILL need help...I don't care which machine you buy.
I am partial to my TL18LS (tinlizzie).
Why?
I'm a frugal quilter (ok Cheap)...my Lizzie was on sale, 1,000 off...that's the reason I got her.
I was going to get an Innova...but hubby insisted on one from a dealer we could drive to...so Lizzie it was.
If you can (I can't...don't have one anywhere close), go to a show and test different models, ask questions.
Buying used is always an option..but make sure the machine is still in working condition.
Don't expect to support yourself with a quilting business...too many of us have our own machines now. Not to discourage anyone, just saying....
Yes, you can maybe make some extra money, and even pay off the machine...but it's not the money maker some dealers will say it is.
All businesses have to have a business plan, and some research to see what competition is out there.
Once you find the machine you love, buy it...you will have so much fun using the machine & making beautiful gifts for others.
Don't let the brand or a dealer pushing a brand sway you...try them, and remember...they all quilt, and they almost all work the same...my Lizzie uses the same bobbins as a Gammill, and timing it is very much the same....price...1/2 or less than a basic Gammill.