This piece is utterly stunning. The depth and movement you have captured is wonderful. Paint time?
Uhhhh... no idea. Typically stuff like this is about a 2-2.5 week process, but that includes a lot of time I spent trying to get, well, paid work.
Hehe, I feel your pain. I think it's brilliant, and with a great consistency. I find if I come back to a piece of work even overnight my whole approach changes a lot.