TF I have 8 of these. Locally these were one of my best sellers. Theres not many massed produced shad baits that are 1.5". So there's a little niche there! Since I'm done selling baits I'm getting rid of 5 or so and keeping a couple for me.
Bucko it's like anything else. You could get into it with just a few hundred bucks... But the question is would you???!! You'll want this, then that, then you'll have to get that...
But really To inject plastics all you need is an injector, plastic, glitter, colorants, and a mold. Could be done for under $300.