I'm sorry to hear of your problems with the Neighbor.You deserve better in your new home.
I look at good Neighbors as a gift from God.No amount of money can guarentee them.Upper class neighborhoods also have bad Neighbors.
I've been very lucky.I live in a city that is always near the top of the list of lousey places to live. I lived here 60 years,in 4 different neighborhoods,and never had a problem with Neighbors.
I do have concerns about the 'Critters'that wander in from other neighborhoods,and every neighborhood has at least one 'Oddball',but I can't recall any really bad Neighbor.
Frank