I really hope I wasn't too discouraging. And I do hope that your book will be a success. I like your articles and think they would be perfect for a book. With the popularity of STEM these days, I'd imagine there's a good sized market for it.
If extra funding is needed for the final push to publication, I wonder if a more traditional crowd-funding model would be more appropriate. Maybe it could be structured like a pre-sale.
I was looking for a Hive crowd-funder, but Buymeberries is the closest I could find on hiveprojects.io.