Actually, thinking about it, I bet you could do signs for different specialty shops. Your costs are probably low. Quilting shops for example, "The one with the most fabric, wins." "Quilts stitch life together." Consignment shops, small inventory, a decent display, a variety of fun sayings might be very interesting to some shop owners--no investment, not mass produced, maybe even their shop or website engraved if they want it (they pay for these in advance). I bet tattoo parlors would go for signs "Tatoos let you make YOUR mark." Local smoke shops, "Puff the magic (+ image of dragon)" If you have a CNC, why not?
The more I do, the less I accomplish.