40 hours!!! ouch.
May i suggest if you REALLY wanna wate a few days of rending, Put on very simple color sceme, Like basic blinns with reds, blues, whites. so on. And take a picture of a room. Blur the image and add it as a background plane. Take the model with the knew plastic like textures render as it is now but without the far wall, And it will look like a Toy on a table in your room.:-D