I added up the amount of time it took to make him today (a friend had asked me) and I'd say 35 hours maximum. Aka enough time that, if my friend doesn't appreciate Leonidas, I'm going to kick him in the shins and keep him to myself!
I really would recommend Delicious Crochet patterns to anyone that enjoys making ridiculously cute things! The patterns are very in depth and include many pictures to guide you along. So go get some!
I've started my dinosaur as well!