You could act as his editor. When you think he might be getting close to ready, you could put forward a deal. If he can write a post that you think is high quality enough to post, then he can get one, and you'll act as his editor, and approve posts.
As to the coins, it's up to you. I think you should put each in it's own case though, whatever you do with them. They're a moment in history.
Now I kind of want one eventually.