I flirted with the idea of getting a melanger for making peanut butter and tahini at home, but my blender hasn't burned out yet (yay blendtec) so I haven't needed to explore this with any urgency. If anyone can recommend a way to make home nut butters and tahini with less heat than a blender I'd love to know.
So few other home uses for that kind of grinding and milling machinery, tho. I'm trying to think up anything else this could be turned to, and coming up with soaps, fireworks and flash powders, inks, paints, and pigments. Nothing food grade or wider niche.
Home-made Brazil and cashew nut butters, maybe? now worse cleaning than chocolate, surely.