Actually, if you want me to talk as an specialist, it is not hard to make a UAV. Almost, every University in Turkey design single UAV and Fly it for competition. The thing makes UAV more valuable is its duration in the AIR(only 5 countries in the world had new battery technology in the world that make it to stay longer duration, such as 24 hour. Second, its technologies. It should be able to take thermal or other pictures from 10000 feet above the surface. Thats not many countries can do. Thats why, the iranian drone came close to the surface to be able to take the pic. If even rebels see it with bear eyes and take pictures, then you should understand that it is a shame. They should be on the sky that nobody see or hear about them. and the last it, millimetr wave Radar, Sar radar and all those technologies. Millimetr wave radar is very important if you want to fire from UAV. in case of fog or rain or any bad weather, you will not be able to fire missiles based on the Camera. On the other hand, if you far above the sky and want to search ground forces, SAR radar is exactly for that. It make the picture of ground(also showing all forces from tanks to even soldiers in HD quality). Without these technologies, talking about UAV is childish. You think, France, Germany, and UK cant make these toys to fly around and take some pictures? They just understand that its not that easy.
One more example is, in Turkish UAV, it uses more than 4 computer in landing that just to make is autonomously landing and flying, without is its almost impossible to fly the drone and land it successfully at night. Also, check North Korean drones found in South Korea recently. They were using home Camera made in Japan)) so this is what we are talking about.