Third Year Film Idea

I came up with a concept of a potential third year film. I would like to go about planning this and if it becomes too much work I will simplify the idea.

The two characters are a man and his cat, and the film is about the man trying to take his cats to the vets. The problem arises when the cat refuses to get inside the cat carrier, and so the man repeatedly comes up with crazier and crazier ideas to get the cat into the carrier so that it can be taken to the vets. 

The good thing about this idea, I think, is that I can vary the amount of methods the man uses to try and get the cat into the carrier. If I find there's too much work I can just take one of the scenes out.

I want to do some of the planning before summer (mostly character design and starting the storyboarding) but plan on doing a big chunk of the work over the summer. I want to have at least some of the animation done before I come back to University.