Create a 15 sec animation

Hello to everyone. For 1 of our clients, we need to create an animation. It will be ~15sec animation. The company, is a company which help people "loose weight". So we thought the following for the animation: At the begining, a big sphere which moves very slowly. We right as a message (your weight makes you advance slowly? ) then the logo of the company falls over the sphere, and distroys it. (and we mark the message "X Company" is the answer). Smth on this spirit. Pls give me your best price, if I'm happy, I'll realise 1 animation each month. Best regards