You are making those machines dance a fancy damn jig!
Not sure how you're using your CNC, but here is a writeup I did some time ago on making money with a CNC. Your stuff sure meets a high standard. I'm retired now, but taught marketing to eye doctors for almost 30 years. Not likely to take up CNC myself, but the suggestions in this pdf are how I'd approach it if I got one. Nice to make stuff for family, but I'd want the thing to pay for itself so I could move up to another machine without worrying about cost.