father is a retired mechanical engineer. He'd like to make some $, so he keeps designing this or that, and building one or two prototypes. What he does next, is not get them out there, but draw up all the cutting or building parts on CAD-CAM, and then draw up a list of numbered parts. It's part of the mfg process to him. No business has ever made it to selling. One actually made it to packaging, then he dumpt it. ... that one probably would have actually been lucrative.
Well, back to quilting. I'm very like that. I draw up the quilt. on paper. Plan it. calc the yardage myself... often I buy the fabric... sometimes I cut it... occasionally I make a few blocks.... then I get excited about something else, and start over at square one (pun intended). Some of us like the planning part. My home is the nest of many UFO/WIPs/PIGS.