I thought farming was something you could repeat over and over in a short period of time. Not a once a week event. I don't think the OP had 25-40 man raids in mind.

That and, I consider farming something that gives you pretty consistent results. I never understood when people said they were "farming" rare drops - like mounts or pets or the super simian sphere thing.... Doesn't seem like farming if you could do it over and over and over again for months or years and get 0 result.