i have only been quilting for 3 years and do pretty well machine quilting small projects on my home machine ...but If I had the money i would get a long arm in a heartbeat. I love the beautiful quilting you can do on it and the time you save. I personally would be able to finish more quilts faster.
I have even checked out long-arms. As cheap as I am if I had the money i would definitely own a Gammill.