A couple of thousand dollars gets one a two cycle nitro drone that can fly for an hour, covering 80 miles. With that investment, ans a slow flying long winged design, carrying 20 kg of freight is not a problem. Cost is low, except risk of a crash, cheaper than a car, no need for roads. Limited to good weather. CHeaper than wheeled freight, cheaper than a small car.
Winged aircraft is they to go, long or short distance, short runway. Lightweight foam construction, no pilot, little liability potential.
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