Thanks for the article and the insight, Lee. I'm planning on building something for real estate as well and have some target users working with me but I probably might not have enough insight on the pains of the process. I'm tempted to go your route and get a broker license as well.
I spent 5 years in commercial real estate brokerage (multifamily) and closed some signifigant deals. What you are building is radically different that what I am working on, but they are both in the real estate space. I'd be happy to talk to you sometime about it. My email is my HN name at Gmail.