I am a real estate appraiser, and I went to the realty offices in my area, an offered house measurements, video in/out and photos in/out. for one set price. I just got started and have done one vacant land and a house. I have interest from other realtors as well. It is has helped me that the NC Realty Board has laid the law down on realtors. Basically they said if you are caught flying with no 107 cert, you will be fined. Most realtors are happy farming this out. I have also went to a few insurance companies as mentioned above. I also advertised for commercial/promotions, and I also have put my info in at my local Chamber of Commerce.