The cost of products is easily compared to the cost of weight. For each kilogram taken into space, a CubeSat manufacturer may be charged 50,000 euros. A single bottle of water can cost from $9,000 to $43,000 to get to the International Space Station. Costs will be less on a UAV, but there is still an associated cost in fuel requirement to get the weight to leave the ground. Less weight, less fuel, less cost.