Obviously, the safer thing to do would be what has been done before. Hire a professional and put him/her in my basement for a year, that way my creativity can be tapped spontaneously and incognito. This is how Gladiator, The Matrix, A Beautiful Mind, The Big Fish, Forrest Gump, Dead Poets Society, Good Will Hunting, The Sixth Sense, Pirates of the Caribbean, Phantom Menace, Avatar, Titanic, Inception, Gravity, Interstellar, The Martian, and dozens of other successful Hollywood films have been written. Do what the best of the best do, steal with dignity and aplomb.