The DMG starts at 1000gp but doesn't have a lot of disctiction in the types, location and such of said small house.
you want a basement for icky stuff, trust me.
2. Valrik belongs to an organization that deals with alchemical and poisonous substances, probably with ties to assassins and other organizations that use these substances.
JCBarnes, does Valrik have any official ties to the University?