OHHHh that would make me tempted to get some Scottish Dumpies and then play loud bagpipe music to make them feel at home.Four words, "Where is it written?", followed by two more, "Prove it", should take care of her demands. Never heard of a 10' rule, NEVER. Nor have I heard the neighbors must like it. There may be some association standards that you have to satisfy, but not a specific neighbor's. Research it, then tell her to sit on it and spin.
ETA - I've seen you've done that. Out - laws or not, don't allow them to speak to you that way. She hasn't got a leg to stand on so let her rant. Remind her it could be worse, you could have some dog killing livestock running the neighborhood. Or, you could play loud rap music/opera next to her house all day. So, she needs to learn to appreciate what she has.