Bienenwachs

Hello everyone, I would like to get into candle making to sell along with my honey at a farmers market. I would like to hear any advice you may have as far as deciding on what type of wax melter to get, in particular what size, brands, and on the method of heating. I'm actualy thinking about buying a direct heat melter in the 18 or 40 quart size although I have really no experience to base this on. Do thoughs sizes seam big to you? I could buy a smaller size, the cost is about the same from one size to another. Thanks you for your time. - Mark