3 days isn't enough time to do a quality job on all of them given "one shot". Better to just prioritize some sample of discs and do the best you can-- consider

3 days isn't enough time to do a quality job on all of them given "one shot". Better to just prioritize some sample of discs and do the best you can-- consider it a pilot run. If you monitor everything you'll be able to use the pilot run to estimate and propose what it would take in terms of equipment, time and process to do the whole thing in a reasonable time.