On TAR 14, teams had to take a very early morning,long, expensive taxi ride from Interlaken to Zurick. Production planned that and gave them money to cover the cost of the taxis. Thats is why the high cash amount for Leg 2. Leg 3, the teams had to pay for 1)a train ride from Salzburg to Munich, 2)then late night/early morning taxis in Buchrest 3) then the train ride up near Dracula's castle and finally 4) the taxis around Dracula's castle.
Production knew they were going to have a lot of out of pocket expenses for travel, so they made sure they had enough cash to cover it.