I am sure Chaim is doing many great things and is always busy, and I of course know nothing of his schedule, aside from the great things he does for the JTF forum in English and Hebrew, making videos, answering questions, commenting, publicizing the site, etc. If that is what is taking up his time, I really, really think that producing a book would be a much higher yield and benefit the movement greatly.
Chaim Ben Pesach's memoir would be a bestseller (according to me) and he would tour the world giving interviews and would be on TV discussing his book and his life and the future of JTF, Israel, etc.
As it stands, JTF could become a mass movement, but it will be an uphill battle.