Oh, the folly of a playstyle wherein a character can, without paying twenty-five gold pieces, start the game in possession of a bit of fluff from the back of a sheep! What madness!
Obviously, the only things that exist in the world are what is available on the equipment list. The only foods are meat, cheese, salt, and bread--no vegetables, no fruit, and don't ask how the cheese gets made, 'cause there ain't no milk. Houses must be built out of metal, because there's no such thing as brick, wood, or stone. (Oh, and the only metals are copper, iron, silver, gold, and platinum. The naming of bronze dragons is a great mystery.)
But wait! Sheep are on the equipment list. So I could spend the first session roleplaying the process of finding someone who has sheep, and negotiating the purchase of a bit of fluff. And then, having determined fair price for that fluff, I will buy the whole entire sheep for the list price of two gold pieces, and earn back my money selling fluff at market rates to the local wizard's guild.
There goes the first session of the campaign. Second session will be helping the party warlock justify their possession of a creepy little voodoo doll made of straw. Sometime around session six or so, we might actually leave town.