CocoaTown Stone Ultra Grind + (used)
I started off with an interest in making bean to bar chocolate. Hence, I have the 3 essential pieces of equipment to do that for a hobbyist. You need a melangeur, which is what this stone grinder does. I ended up using it to make my hazelnut butter smoother for gianduja. Also, a great machine for that. Be aware, you do need to have a fairly liquid or small quantity of product for the belt that spins the wheels to work. I ground the hazelnuts in my food processor first, then used the grinder to make the nut butter smooth. This machine sells for $500 new.
Everything you want to know about making bean to bar chocolate at home you can learn from www.chocolatealchemy.com