I know a few people who make stuff to do with hobbies. For example I know one person who makes fishing lures and another who makes ham radio antennas. Oh, and another friend who make rubber melee weapons for LARPing.

What they do is fairly simple and doesn't need CAD experience or the use of CNC machines/3D printers. The key thing is to make a good quality product, offer good customer service and work to get word of mouth advertising.

People with hobbies and disposable income are a good market to target.