[programminggeek]

I would TDD in either case simply because if you end up maintaining it at all, you're going to wish you had tests. Also, I wrote an architecture that makes starting from day one using TDD much easier. It's called Obvious: http://obvious.retromocha.com

Once you understand the concepts, you can whip up a simple crud app in a couple hours. Example app here: https://github.com/RetroMocha/obvious_status