I’ve always quilted them on my own machine starting with a king size quilt, I quilted with a walking foot on my little 80s singer sewing machine. I didn’t know any better, so I just did it.
Now, I have a Janome 6600 and it’s a dream to use a walking foot or FMQ on it. Since FMQ is my favorite part of quilting, Last year I bought a used sweet sixteen sit down machine. It’s almost as easy as the 6600 and the large throat is a really nice. I haven’t decided yet if this was a wise purchase or not.
you can really save a lot of money by doing your own quilting. Walking foot quilting is easy to learn and produces good results. Leah Day has a new book and block of the month where she teaches walking foot quilting.
Good luck