For clarification, are we designing a poster or a wall chart?
We can budget enough words for a 20 to 30 page booklet of 10 point text on a wall chart. I saw one for D-T fusion on a black background with the main entry text over an image of the Earth in the center, surrounded by around a dozen sub-stories, maybe more. Full disclosure was not the objective. We could work backwards from, say, a 250 page book concept/outline to map what information goes on which of 8 posters in the series.
Each of these could become a salable product and a lot of the source material could come from FFS threads. I’ve seen a guy do this on the Warrior (marketing) Forum a few years ago, turning only 1 thread into a WSO (Warrior Special Offer- their new product advance discount corner area). I know it works because I bought a copy.