That's what I budget. However, we are very, very frugal. We share, bring some food from home, and rarely buy on impulse. Your needs may be different. The rule I go with is 1 meal a day in the restaurants. Yes, children, we will eat in a restaurant every day, but only once. We have breakfast in the room, and have an apple, nuts, or healthy cookies for lunch. Toward the end of the vacation, I assess how we are doing, and I may open up the purse strings a little. You may do well if you let your children have a set amount each day for souveniers and snacks. Then, they will see when it is gone, it is gone, and will not be begging for more, since they are responsible for their own purchases. Again I say, your needs may be different.