Real Estate Law USA.com

I have both a law degree and real estate brokerage. I just finished law school and what I am planning on doing is specializing in estate planning (drafting living trusts, etc.), but also assisting my clients with their real estate needs such as listing and selling their homes, etc. In the part of the country where I live (San Francisco) Real Estate brokerage commisions are still very substantial, and in fact, I would venture to say that I would probably make more money through my real estate services than my legal services if I offered a "one stop shop" sort of business where people go to me for both legal and real estate advice. My question is, how feasible would it be to combine an estate planning legal practice with a Real Estate brokerage servie? Has anyone ever known of an attorney who also did Real Estate on the side? Any thoughts would be greatly appreciate