The other thing to take into consideration is the economy. It's on a downward spiral at this time. Not sure when it's coming back up. Lots of people out of jobs & more will be lost in the near future. They will cut back luxuries & quilting will be one of those. (ask me how I know)
One other thing to look at is who is in your vicinity who will want longarm quilting done? I live in a county that has a high percentage of retired people on fixed incomes. Not much business there.
Ask around. You may have more business than you can shake a stick at. But always know that change can come at any time.
Good luck.