I am happy quilting on my vintage home sewing machines. I cannot justify the cost of the machine plus a new building in which to put it, and I have no desire to quilt for others. Even if I did quilt for others, I do not believe i could ever recoup the cost of the machine. (Not to mention the set up time.) Also, as a teacher, I believe that everyone can learn to quilt on a domestic machine.
Your mileage may vary.