Student characters

[Herpo Ricardus]

I read the rules and saw that you can only have one student at Hogwarts unless you buy the right to have more than one. I could only see a prize for 900 points for getting more characters in institutions, is that the cost for having a second Hogwarts student?

[Kathleen Ellwood-Luxe]

That's correct!

900 points earns you a second character in the institution of your choosing, including Hogwarts.