The Lee 20-4 pot and a Lee 6-banger mold (don't forget to buy handles) is a great place to start. You can go cheaper, but not much cheaper and anything less will be a *lot* slower. It's at least 4 times faster than using a 2-cavity mold. Take a look at the 230 grain "tumble lube" truncated cone bullet. You may or may not need to size the bullets; try it without and see how it goes.
Do you have a source of scrap lead? That is the biggest hurdle to casting your own.
"The only way to stop a bad guy with a gun is with a good guy with a gun"