Keep in mind, you need to keep that all off the books. Selling reloaded ammunition at a profit without an FFL is a federal offense.
Premium bullets will set you back a lot more than your average hunting fodder bullet. I want to say the top end per round I've reloaded is somewhere in the 75cent range, but can get most of them done for around 50cents. Relatively speaking, you'll look somewhere in the 1/2 to 2/3 price of factory rounds.