Kudos Sound & Vision offer a certain number of visits free of charge. After this grace period, one might expect for continued services to be chargeable, like any other profession. This starts at £45 per hour for smaller finite applications, but more likely charging is considered on a half-day or day rate depending on the nature of your requirement.

This of course would exclude any additional equipment or applications that you might need.

An optional SERVICE & Maintenance Package is available on request, with the cost dependant on the nature of the installation, but typically starting at the equivalent of less than 55 pence per day.