Site Document

Im not sure if we are already delivering one of these, i tink we dont. It would be cool to deliver a pdf togheter with the site to each of the customers. Im not sure the format and how long we should take to write it, but could be:
-generic section with wordpress stuff (create page, post, categories, etc). This is easy and would be written once for all..
-custom section focusing on each customer’s site. For example, creating testimonials or updating gallery images.

I guess its easy to justify this expense to the client, adds value and will save a lot of q’s from them..