A planning consultant sounds ideal. I’ve been avoiding the architect route as I’m planning on using a standard plan (with a couple of small mods) from a website. This may or may not be a good idea. 🙂
I’m unsure as to the answer regarding Julian. I know I’m not in their “Historic District” which would require additional architectural permits. Beyond that, I don’t know if I’m in the city of Julian, or even if Julian is technically a city or not! I believe it might just be unincorporated San Diego county. I suspect you will know better than I do.