Unfortunately, I joined and completed the Bards College before entering into the Blue Palace in Solitude. Now when I approach Falk Firebeard the option to do this quest doesn't appear. I want really badly to buy the Proudshire Manor house. Why can't I do this quest? Is there any other way to be able to buy Proudshire? Thanks!

Do the quest for the jarl of hjaafinger regarding torygg's horn.