Scratch build caravan

I found this scratch build caravan in a little shop selling handmade southwestern art.  The clerk told me it had been there for years and they thought they'd never sell it but he had no idea of its origin.  The perspective is way off and there's no real scale to it but I simply couldn't walk away and leave it in the store so it came home with me.  I'm sure that it will eventually tell me what it wants to be. I'm guessing that steampunk will win when it comes to a final decision.