Board Thread:Tapped Out Help/@comment-174.5.165.91-20151218184409/@comment-25046890-20151218191946

Each level has a required building that must be build before the questline for the next level's building can start. But I'll bet you don't have the Guilded Truffle and/or Orange House. Try building those, and I'll bet you get the questline up to the Hospital Quests. Orange House is required for Dr. Hibbert to sell organs on Black Market, and the Truffle is needed for the rest of the quest chain that includes the FlavorMax bit that happens before the Hospital unlocks.