Keep in mind that a good, well made quilting machine and frame will keep the better part of your investment. The high end machines can be upgraded to new drives and boards (the computers) and will run for YEARS. You will not find a Gammil, A1, APQS (and a few others) that is worth nothing. There is always a resale value. This is not always the same with our home machines. I know that my 11 year old Bernina computerized machine is not worth anywhere near what it was when it was new, and 10 years from now it may be worth nothing!
For example: If you buy a $20,000 machine, use it for 10 years, it may still be worth $15,000. That means it cost you $500 per year to quilt your own quilts. The life expectancy of these machines is very long.
Just wanted to add some more food for thought.