If you have a larger machine like the Viking Diamond or Babylock Ellisimo, you are going to pay through the nose for a bag that will hold these machines with the bag also to hold the embroidery unit. I think a trolley set comes with the Viking; however, not so with the Babylock! I have one on layaway and hope to have it paid out before the machine becomes obsolete!
For these larger machines, the bag has to be a minimum of 24" wide!