Create an 3D Animation

I need a 3D animation for my client. This is a pilot. If he likes your job I will get the whole thing done by you. Concept is: 'An alien (kiddish looking) is peeping into a room outside of window and see a kid is having potato chips. He just steals a piece and hold it as if testing, eat the chip, and then run away picking the packet.' What will be your price and time? No upfront payment, escrow only on completion