This would be the cheapest way to start to so if it is for you? Buy pre-poured and painted heads (this would save you a lot of trouble), banded skirts, swivels and blades, etc. to assemble. What ominousone said is right about getting into tacklemaking. If you like it and do not pour any other lead jigs, etc I would just have someone else pour the heads for you? Right now I have a couple custom molds that were $200 each to pour spinnerbaits so it can get expensive depending what you want.
Allen