What distance do you need it to cover? Is a range of 150 feet (from the interpreter to the furthest member of the audience) adequate? If so, your most cost effective solution is a Portable System.
If you need more than 150 feet, you will need to go with a semi-portable system. You will lose some portability, but it will still be easy to set up and take down.
Multi-language interpreting systems are rather complex pieces of equipment, so don't be embarrassed to call us if you have questions!