The landlord is NOT the person to worry about - it's the city of Los Angeles. Cities across the country have laws now that prohibit owners putting their rooms for rent on Airbnb or other websites. Cities have hired employees who check these websites and if you break the law, you will be arrested. You need to know that the major hotels have sued cities for loss of income because renters like you put their rooms for rent on Airbnb. So the cities gave in to the hotels. New York City's law states that owners must have a minimum of 30 days to rent on Airbnb. Anything less than 30 days is a violation of the law.
You need to check the law for Los Angeles.