first of all there is no law saying you have to have a fence between you and your neighbor so the invasion of privacy thing is out....secondly, was it your fence or theirs to start with, and whose side of the property line was it on?....if it was you...
Congrats on your new farm. If the fence posts are salvageable why not just take down the barbed wire and reuse the posts? You can always replace and/or brace up any areas that need work. If it were me I'd be leery of using tape or other weak electric...
in harvest moon fomt, you can build fences from stones or wood. if its a fence for your chickens, use stones because when the dog comes, it will scare all your chickens away if they're surrounded by a wooden fence. if its for cows or sheep, a wooden ...