Isnt the point of a render farm, to be able to handle the high res / high quality stuff? Your settings dont seem too crazy to me. Pretty normal for a final render.
What kind of farm is it? You're rendering out a 14,000 pixel wide image so the expectation should be that this will take a good amount of time.
probably need to go back to default settings and update camera, environment, etc. settings. There may be a bug that once you select other than RT CPU, the vray settings get messed up.
