Hey Bob,
How much can I save casting bullets?
How many do I need to make to pay for the pot heater, molds, sizing dies, etc.?

As far as reloading goes, the bigger the bang, the more you will save. I even reload 9mm plated at about $.14 per round when you can buy factory loads for about $.21. I listen to the radio in the basement and just relax. It's part of the hobby.