Chipp has a point here, David. Vue can render thousands of unique trees blowing in the breeze, physically accurate skies and clouds (which shape and direction animate too), with advanced lighting models. I'm not too sure  Max/ MR  can do it ( at least I know  C4D can't).
If you are considering buying Vue, my guess is it is for those unique features, otherwise, you'd simply throw in a few modelled trees and an MR sky, but the resulting environment wouldn't be as rich as Vue's.
So a frame like this won't render in 5mn, this is for sure. But the question is: will the final animation win you the client without the Vue environment in such a competitive market?
Maybe it is worth spending twice the rendering time for the project?