[quote=@EliteCommander]
[@Fallenreaper], [@Lucius Cypher], I have another question. Since Ssarak is doing a mission for the college, and doesn't have Ravine-delving supplies of his own, what kind of supplies would they give him for the mission? Ssarak would not have the coin to purchase anything beyond what he is given. 
[/quote]

As Fallen mentioned, and Tyrael is carrying most of the food for you all to eat. Rations that will keep you alive while you're below, doesn't need cooking or cleaning, though not very tasteful. Tyrael himself can live off the creatures in the Ravine if he needs to eat, and for the most part as a demon can sustain himself off the life energy of the demons he summons (If need be). That is to say, he'll eat his demons.

As for other supplies, honestly you're kinda on your own. Tyrael isn't generous enough to spot everyone gear to take on the Ravine, and he's already weighing himself down considerably carrying all your food (Not to mention painting a target on himself doing so). Things like sleeping bags, equipment to take care of your weapons, water (Hydration will be very important as we'll be going into very hot and dry areas), anti-toxins, and so forth is coming out of your own pocket. You can always try to test your survival skills in the Ravine, but the catacombs (The first area we'll be going to) isn't exactly a hospitable place. 

Also take into account that Tyrael expects the group to be down there for quite sometime. Even if he was alone Tyrael would need at least three days open to take into account the multitude of ways the Ravine will prevent him from going back to the surfaces (it does this to everyone, including the inhabitants). A week might be too much, but we're certainly not going to be done in a day.