Hi Marcos...I own a small video production company with my husband. We incorporate drone cinematography into our film projects and would like to respond to a couple of your original questions regarding pricing, for whatever it's worth. When we quote a price on a project, it includes pre and post production work, our time/travel expenses and we always let our client know that we carry liability insurance, which is built into our rate. We spend a lot of time educating our clients about why it's in their best interest to hire a certified Part 107 drone pilot and why having liability insurance matters. With this said, I have to agree with Av8Chuck that real estate photography/videography is a tough nut to crack due to price undercutting by other drone operators. Realtors don't like to pay a "fair price" and don't necessarily see the value in drone imagery. Therefore, in order to survive as a commercial pilot, you end up taking more jobs for less money or look for other revenue streams in other areas.