It took me 29 hours back in 2010 to swap the tranny and clutch while I was in there, but I was relatively clueless. I could to it in half the time now. It is not easy but I was a total noob and did it by myself.
Clutch doesn't take long, just a little arduous getting the shafts out. Some come easy, some don't. That was the longest part for me to be honest. Just don't get in a rush and plan for Zen beer breaks and all will go well.