How can you protect yourself from nasty narcissistic neighbors when you can't afford to move?

Nieghbors don't go away. Sometimes people are unfortunate to move next to nieghbors who are horrible to them. If they cause damage or are harrassing you, put a restraining order on them or take them to court. Document everything (names, dates, details, time, witnesses, etc) so you have it all laid out when something bad happens and you need to take legal recourse. Don't communicate with them, put up a fence if you don't have one and keep to yourself as best as you can. Good luck!