I realize that you are looking for a consultant to do this for you, but this info will be useful to any that reply:
What barcode scanner will you use?
One that is physically connected via usb to a computer?
The camera in an iOS device such as an iPhone or iPad?
A Wireless scanner that has to be brought back to the computer and the scans downloaded to the computer in a batch?
It would be a USB scanner plugged into a PC, we are unsure of which one but just a generic model. The idea is that we have a massive collection of camera equipment that we take on shoots to film projects ect, and we need a way of checking them in and out so we know where the equipment is and who has it. If this could sync to a mobile as well that would be brilliant but right now we only need a way for it to work on PC.