Okay here is my quilting machine and I only have $20 tied into it. This is my go to machine that is hands down my most favorite machine in my collection. Parts are easily had for cheap and you can not kill it if you tried. I have made and quilted King sized quilts on it no problems at all, true my bench is 146x36 but it still is a Model 15 in a treadle. It has drop feed dogs so I can FMQ and with my attachments I can do any decorative stitches I need.
Your would be better off buying a good used vintage machine like this one than to drop a lot of money on something that will be in the trash in 2 years or less.
Billy