You need two machines for when one is in the shop.
I have a cheap Brother that stands in when my good Viking is getting an annual checkup. Computer machines should be treated with care.
There are bad reviews for the fabric mover so I did not get one for my Viking, which also has one available. The old models have to small of a hole and you keep hitting the edge. The newer one is expensive and people say it is hard to use on a large area and of course the demo is on a small piece.
I would check on getting a used Bernina with the stitch regulator.