This looks like a project that has reached quickly beyond my risk aversion level and the practicality to doing it. I appreciate the replies.
Coax cable (RG58) weighs over 1lb for even just 50' so its not really practical.
My 1st thoughts were for a 100' vertical. The IR loss at 10+ amps for wire is way too great for wire small and light enough to be supported and fed with close to battery voltage.
Going to 50+ volts and a voltage downconverter near the aircraft had some hope. Even 22 ga insulated wire would weigh .8lbs (200'). A suitable downconverter another .75lb
https://www.amazon.com/Yeeco-Converter-Adjustable-Stabilizer-Transformer/dp/B06ZZG2GPR
Unless I could save 1lb by emptying the battery I wouldn't feel good about more that 8oz additional load continuously on the drone.
Let's face it, 22ga wire isn't the strongest element in the periodic table. The thought of a wire break and the ensuing dive to earth . . .
So for now this project has gone to back shelf. I may someday revive it. In the meantime thanks to all for the suggestions.