I'm meeting up with John next week to discuss what I can do for him. At the very least we can prioritise what he has left and I can offer him some room at my place. A lot of what he has are documents and manuals, I suggested that at the very least, they can be preserved digitally as opposed to taking up space in a container.
It wouldn't take long to unbind and scan a manual using a copier with a document feeder.