I think you're better off just charging per project. People are more comfortable paying $10k for some specialized help, even if it only takes 10 hours, than they are paying $1000/hour for 10 hours of work.
Something like what Paul Rand did when designing the NeXT logo. He charged $100k flat to "solve the problem" of creating a logo.
Fixed fees only work well when the client has a discrete problem that needs addressing, but in my experience those are the best projects anyway. Imagine a team of people struggling with some hard problem for 6 months and then you (because you're a specialist) solve it in 10 hours. Those are the absolute most fun things to do. Hero Projects.
Something like what Paul Rand did when designing the NeXT logo. He charged $100k flat to "solve the problem" of creating a logo.
Fixed fees only work well when the client has a discrete problem that needs addressing, but in my experience those are the best projects anyway. Imagine a team of people struggling with some hard problem for 6 months and then you (because you're a specialist) solve it in 10 hours. Those are the absolute most fun things to do. Hero Projects.