Thank you for writing this up, Dave. I'm only just starting out and I'm not really getting a lot of work yet but I have been asked for my rates a few times, and this kind of insight into a professional business like yours helps a lot.
You guys are such hipsters; there cant be more than 2 or 3 variants of something, because if you find the 3rd or the 7th its passé and something to be frowned upon if someone tries to replicate it.