Thank you!
It's hard to tell how long it takes, because it depends on the amount of details and the mood I'm in. ;-) And I never keep track how much time I spend on them.
This is an older piece and I guess it must have taken me about 20 hrs of work. I'm a slow worker.
Some of my newer drawings took me far longer to complete. The last one for example, which I will upload too, if I'm allowed to, I started in July and finished it on last of September. :-/