As soon as possible!
Unfortunately, I don't know how long that will be. I'm going to be typesetting it myself with lots of love using InDesign. I hope the final result will be a really nice book, but it could take me a while.
Still, I plan to work on it every single day, so maybe it will go quickly.
> I've gotten enough value from it that I'd like to thank you by paying for it.
Just a thanks is more than enough, but buying a copy of the print book will be the best way to throw money at me (short of showing up at my house and making it rain, I suppose).