Hi Barbara -
I believe Kim to be a true expert in her field and so her comment re: the new direction is one I'm taking notice of and now know I should be doing some extra investigation. Yet in my own experience with people I meet as I'm out networking, those I run into seem to not have a clue about the setup and seem intimidated.
I think you have a good direction. I would just suggest that you build in flexibility & room for growth in your business plan & marketing plan so that you can grow & maybe even shift gears quickly as things continue to change & grow in the SM industry - as Kim's comment would exhibit, at least to me because I can't keep up...:-).
In case you need some additional resources - which looking at these resources may help you with the question about if you can make a biz out of this - would be to check into
Kate Buck, Jr. & Ryan Deiss (both on facebook and experts in the field).
Like Kim said - you will be most successful if you understand
SEO because Facebook is now ahead of Google when it comes to traffic and it will be important to teach your clients how to leverage that.
I chose to specialize in Internet Marketing because I know right now I personally don't want to try to keep up with the fast moving climate of SM. It's exciting though, fo' sho'.