This concept sounds like a great idea to me. There are a few websites which play music that I care about and they have a PayPal 'Donate' button to help defer the time and expense of maintaining the site. The listener pushes the button and uses their PayPal account to make a donation.
I certainly wouldn't be adverse to chipping in some bucks to Mac in order for him to began work on a project like this. It could be in PDF or Word format for all I care, although I imagine it would need the blessing of the PG staff, et al.
With the text and some selected screen shots, I believe that the project would have a lot of value. Posting the drafts somewhere for proofing by the old timers on this forum would work also. Contributions from those that have advanced specific experience could also be a benefit.
So I say, "Why not try it?" No doubt it would become a difficult and time-consuming enterprise, but it would have a lot of value for a lot of folks.
My contribution, aside from any money, would be as the 'dummy' asking stupid questions...