First of all, consider ALL the cost involved in getting into casting, you can go very low budget; melt your alloy on the kitchen stove, lube by hand, use a "cookie cutter" to clean up your hand lubed bullets, OR you can go the high $$ route, melting pot,lubesizer.
You need to go to the cast bullet sections here and read,read and read, then ask questions.
Now consider how much you shoot ? 100 rounds, a week ? Mo.? year ? and see if the cost of a casting set up will pay for it's self >
Other wise look into useing bulk or bought cast bullets.
Didn't mean to be a reality wet blanket, but I've been there