6k for 10TB?
A Raspberry pi with a sata hat and 16TB hard disk could download and serve this for well under 500 quid.
An off the shelf 4 bay NAS with 4x 6TB drives in raid 5 would give you 15TB or so formatted capacity with redundancy. That would easily be under 2k... Jeez grab 2 and sync contents to a second location.. even a third location.. Still under 6k.