Wife and I started a 3d printing business. We just started a couple of months ago and have put our items in a few retail stores. Our goal is not to do this super fast but more like supplemental income. Also its fun to print stuff for ourselves. I already designed a finger mini golf game and may start to build my own board games out of 3d printed parts.

So I want to build up 3d modeling skills.

I am not surprised but its much much slower to get a physical product business going than just writing some code and launching.

This sounds very cool! Can you share a link to your company website, or are you only selling on eBay or Etsy? I think 3D printed stuff can make great creative gifts.