A big task for an individual.
I think most of us realise that physical publishing is the easy bit
(time-wise I mean).
But a first step would be based what we already have.
i.e. grafting big chunks from the 3 current main manuals, with more and better examples, some of which could be lifted from currently available project manuals.
Some brainy individual could do that in a month. A bit of cut'n'paste, some new examples and drawings and then half an hour with the Spell checker*
(obviously any ex-Government employee would take 3 times longer)
Personally, I think whether anything will ever get done, or whether an individual would get funding depends on Rev-Ed's raison d'etre or "Mission Statement".
(Jezzz, I hate that phrase, but you know what I mean).
* People often poo-poo spell checkers. I used to use Adobe pagemaker for all my documents, it had great insight. My nearest local Council offices are housed in 'Westport House' in Wareham. When I wrote a letter to them , the spellchecker suggested I changed "Westport House" to "Wastepaper House" - how intuitive is that then !!!