Owning a Mid-arm (Short arm) machine does have its limits... but if you
intend to do this as an in-home business, I would go for a LongArm.
Figuring, of course, the money involved for a Long Arm, and how long it will
take to generate customers so you can recoup your investment, before you are
actually making money! My $2000 investment was recovered in 10-12
months, and am still sewing away.
Remember not everyone making quilts can afford large payments for
quilting .... at least not really often.
But the beauty of Long Arm designs are outstanding, and some quilts
just cry to be finished on that type machine.