Time to scan 1000 pages depends on:
Type and Speed of Scanner:
A high-speed document scanner usually has a speed range of 25 to 250 pages per minute (ppm), so it will probably take 20 to 40 minutes for 1000 pages.
Preparation and Post-Processing:
Preparing and organising the documents and post-activities like filing, organising, and quality checks are additional and not included in the scanning time.
This task can be done by hiring professional scanning services. Most have better equipment and experienced personnel in this area.