I save to save, not to spend it on one of the others. If I got a good deal on a car for a week someplace, I would not take that money and say I can go to a better hotel. I don't plan a trip with a set dollar amount in mind to spend up to no matter what. I may have a dollar amount I'll consider the maximum I'll spend, but if I am able to cut my airfare in half by flying the next day I won't spend that on better restaurants.