Thanks for your comments. Looks like there is no good solution. I'll mark this as solved even though it isn't.
Been there and done that. The best answer is to re-educate your senior reviewer about the advantages of online review and all the disadvantages of paper. I know it's a lost battle but it has to be tried. When that fails,
1. Production export to PDF as you said.
2. Unzip into a single folder. Yes, it will be 1500+ PDFs. That is not a limiting factor.
3. Bulk print the exported PDFs. Depending on your operating system and the setup of your local print-servers, that can be as simple as Ctrl-A to select all the files, right-click and print.
Failing that, take your zipped production export to a local print shop and they can almost certainly run the bulk print for you.
