One of the most confusing (and potentially most painful) aspects of AV is dealing with the charges to deliver, set up, and/or operate your equipment. What is reasonable? What is not? When should there be a service charge? Should it be taxed?
Labor charges versus service charges
It used to be that equipment setup was included in the rental fee. However, most hotels now charge either a setup fee or a service fee. You should get charged one or the other, not both. Whatever it's