Start hiring. If you have 10,000 pages that are not based on just a few templates, you have a lot of grunt work ahead.
If you had built AMP first, it would be easy to add bells and whistles for the desktop users.
If you use a content management system(CMS), generating AMP pages should be a much simpler task.
Whatever you do, it’s a lot of server coding, and very little jQuery work.
JΛ̊KE