here is a partially coloured render to show that i moved the warehouses to the river quay.

rendering time is imo no big deal - the clayrenders with everything on it take abt. 15 minutes maximum - this partially textured one took about the same (not everything is textured)
it is not a good render but i don't know anything about lighting - i used omnilight here - but how to place other lights is a mistery to me (not the place, but how to do it) - that's also why i use a black background - the sky renders look miserable (is all my fault i'm sure)

"The light at the end of the tunnel may be an oncoming train"