My friend wants to get a paternity test to be sure that he is the father of his child.?

He does not have health insurance and lives in South Carolina. How much would it cost and is there anyway it could be free?My friend is actually my boyfriend and he has a child by another woman who is trying to make him lose his child. The womans plans are to marry her fiancee and for her fiancee to adopt my boyfriends child [his name was never put on the birth certificate as the father for monetary reasons] is there any way to stop this?