This subject has been brought up in the past. I don't have time atm to find the thread, but it had some decent info in it. It boils down to what you're local/federal/tax laws will allow in terms of regulations and KYC requirements. I'm actually thinking about this idea again, since I'm involved with the real estate field, and having a discussion with my real estate attorney to see what they suggest to get things moving forward. This will be a very lucrative field for block chain tech imo.