Sugakookie's feed

How does Chae-heon have so much money? What's his income source? He's still a teenager in highschool. Doesn’t seem like he has any part time job. He has scholarships but how much does a scholarship pay? Enough to throw it around without a care? I'm not sure, I've never had any lol. His dad doesn’t love him, his step-mom hates him even more so. Why would his father give him so much allowance?