I have run some tests on my landscape and starting on my other two characters - the mum and dad. I have used the same materials as the driver but with altered colours and used a very similiar rig and control rig between them. They are modelled based off the sculpt model out of maya with alterations and low poly reductions and topology change.
I have rendered the just a few renders at max resolution and final gather and one frame took only 12 seconds to render which is awesome. so time for renders won't be an issue!!
here are some renders and a look at my other characters: http://imgur.com/a/o34l4