Hi Julian & Lupi,
I highly recommend that you speak with an attorney who specializes in Real Estate Law. You also have the option of reporting the owners of the property to the Cities local Code Enforcement Office. While I'm not familiar with the City of Hesperia, & I'm not an Attorney, I highly doubt that this set up is legal. I also suggest that you locate a new place for you and your family to live if possible. I wish you luck!