Primarily devops consulting. $250/hour is what I'll charge for emergency work from unknown entities, poorly managed entities, or for piece work from customers who aren't likely to be a significant source of project work. For small projects I don't bill hourly, but rather I'll decide that a piece of work is about 4 hours of my time, and that I'm uninterested in doing it for less than $1k.
He/She probably provides value in excess of that to his clients. It's not about 'what you do' is about how much value that provides to the client. I can't charge that much for a website to my neighbor because it doesn't provide him much value.
On the other hand tweaking a couple buttons could be extremely valuable to a business that relies on it's website to generate leads. Smart clients don't care how much stuff costs they care how much money it will make them.
