Thanks for your interest, guys!
Right now it's still the "proof of concept stage", the mountain "sculpt" from the video is meant to be remodelled. The video resolution was at 320 x 224, and given how basic the scene was, each frame took between 15 to 20 seconds to render.
I don't know how much time the frames from the final scene will take to render. I think it should be quite long (between half a day and one day?) because the final scene will have a very large population of the very distinct-looking geological formations of Mt Nibel, so I guess it will be very high poly. I was also thinking of decreasing subsurf and poly counts for the video frames renders, whereas I'd ramp them up for the field scenes renders (after all, the video frames will have a significantly lower resolution than the field scene images).
By the way, I also have a very basic question: so far I've not been able to find a free software which could generate 60 fps movies from still frames. Windows movie maker doesn't seem to allow frame duration below 0.03s
That being said, maybe 30 fps for these videos would be enough (plus cutting down overall rendering requirements). Any thoughts?
I appreciate you looked into network renderers, that will certainly make things handy. I also know there are a few online render farms for Blender, although I never used them myself.