JonathanLB, Get sued and you'll figure out the compelling reason you should have done it. If set up properly your movie corp will have no assets in it, all equipment, hard assets will be leased to your movie corp (you'll still be able to get tax breaks if properly structured). Therefore you have no assets in your movie corp in case you get sued. The bigger the success the bigger the target on your back from lawsuits (even without any merit). A second bank account gives you no protection from litigation if its still part of the same entity. I could and may be wrong so talk to a lawyer. Good luck.