Go down to your local hobby shop and buy a model airplane kit and build your own drone. Israil did. There first RC airplanes where hobby shop models. Cost? $150. US cost for the same RC model plane, millions. How big are model airplanes? I had on with a 8 ft wing span and twin engines. The othere one was only 7 ft wing span. Lots of fun. Im thinking about building another model, but then I might scare the shorts of some of the towny's and get me arrested for,,, well the cops will think of something.