I think that's an exaggeration, especially for cutting boards. Unlike thickness planers, most drum sanders have an open frame. Even the smallest 16" units can handle projects that are 30" wide. And these units work perfectly fine off 115V.

You can crank out cutting boards like that with not much more than a bunch of clamps, a small drum sander, a miter saw, and a good vacuum cleaner - garage-friendly and under $2,000. The issue is the hours of manual labor you have to put into this, especially since people are not used to paying hundreds of dollars for a decorative cutting board.

There are custom cutting board businesses out there, but they just use a CNC mill to cut personalized shapes or messages in common stock. That's a larger capital investment but far less manual work.