How should I manufacture my pendants

So I wanted to expand in the jewellery business and my friend is going to be my first customer for pendants, I’m already learning how to make grillz, however other than my friends being my main customers I’m not too sure how big the market is for those over here in Toronto. I was just wondering if I should do the process myself for custom pendants, like getting the wax printed then taking it to a caster and so on, or should I just find a manufacturer to do all the work for me? Any advice appreciated!!