@vangogh
I think you are unique, in that you really understand all aspects of design, search and marketing. Not that many people understand it all so well. Just from personal experience, I do not come across this often.
Also it is a huge effort for sustained online marketing and
PR (they go hand in hand). That is something many busy designers cannot keep pace with especially as they keep getting new design works.
Perhaps a really unique agency that has strong design and marketing/
PR skills could take this on, and I've seen them. But, I have not seen many do both right.
Just to me - I'd rather have *the best* web designer and then *the best* marketer. I wouldn't want to have someone that was okay at both.