I am starting a school for writing, and intend to form an LLC. I want to make sure that myself, the teachers or the owner of the premises we will be used cannot be personally sued. My questions: Is LLC the best kind of corporation to form? Do I need a separate commercial insurance policy to protect myself, teachers or the property owner in the unlikely event of a slip and fall? We will be using someone's personal property to conduct the classes, free of charge (someone's home, and unused first-floor apartment building that doubles as an exhibition space).