I’m fairly certain it did not take place in a warehouse. I don’t know exactly what the setting was, but not a warehouse. The props are getting used as scene pieces.
The houses are built, so the companies will get paid. I’m certain Universal will still pay the quoted price without requiring completing the facades.
The BIGGER issue for the contractors is, if Universal doesn’t take down the houses so they can use them next year, it means Universal won’t hire the contractors next year.