On a much smaller scale I have a plastic box that is divided into half, a click and shut one, I keep the walking foot on one side and all the quilting feet on the other, leaving the sewing machine store for basic stuff like reel holders.
I also have a largeish pencil case - tacky gold (can't lose it). that I keep bits and bobbs in - rotary cutter and spare blades, 1/4" ruler. tape measure, stitch ripper and marking pencils and pens. They are all kept in my quilting box as opposed to my sewing box!