It looks like you are heading in right direction. Just a few personal observations.
I am going to disagree with Conor. Having been a member of PPA for thirty years and knowing that it is a great organization I don't recommend joining it now unless you plan to do weddings and/or your business can really afford the annual dues
You will get a lot more bang for your buck by joining and attending the monthly meetings of DPPA. Camera clubs are fine, but they are more about pretty pictures than business. Almost all of the members of professional groups are working photographers and can share ideas and experiences that will help your business grow. DPPA has been meeting near Plano at Swan Court, but is looking for a new site.
http://www.dallasppa.com/
I would also suggest that you consider joining TPPA. For your $85.00 annual dues you will get free admission to the annual convention. The 2009 convention will be next month in Arlington.
http://www.tppa.org/
When you business begins to take off would be the time to join PPA.