Rent or Rot: I'm the Landlord of the Apocalypse

Ford Clark got kicked out by his family in the middle of an apocalypse, though he inherited a zombie‑filled fortress, Nine Dragons Walled City. Now he's the landlord, and the SSS-rank zombies pay rent in crystals. He builds an automated food plant, partners with psychics, destroys a cult, and fights the Zombie King, turning a hellhole into the last safe place on earth.