that means **** loads of films or memory cards depending on camera type - i assume digital - but thats alot of money unless its feeding straight to a pc which i doubt!
Most if not all event photographers shoot digital nowadays and would have numerous cards available as part of the job so memory would NOT be an option. As an example, my Canon gives me well over 700 shots using RAW format on the 6GB card.
Again, most photographers would have a laptop with them to download the pics when they get a chance.