I'd expect a hefty fine... It seems like there's no penalty for being the landlord of an illegal unit other than having to cease and desist. He should have had

I'd expect a hefty fine... It seems like there's no penalty for being the landlord of an illegal unit other than having to cease and desist. He should have had to C&D and pay up a multiple of all the rent ever paid on the unit. The tenant seems like a giant pain, but the landlord is guilty of illegally renting out a unit for years. She shouldn't have been able to remain there and the owner should not have been able to profit off his illegal dwelling.