Those that write film budgets or any other budget must consider their work to be rough. It is easy to change a 6 figure budget to a 7 figure budget just by adding one “A name star”. The budget can change drastically as well if you get a well known director or even change a locations. The purpose of the budget therefore is to give a starting place for those who would finance such a project so that they can get an idea of what they get from their monies and nothing more.