This depends on the size of the booth and type of display you are presenting. You may either rent the booth from the show decorator or provide your own.
If you rent the booth from the official Show Decorator, you should budget $1,000 to $1,500 for a 10 x 10 hard wall booth. This will include a booth sign, carpet, and walls. In addition to the booth, you will also have to arrange for an electrical outlet that supports 1,500 watts if you require power.