Been on both sides of this issue. When I had my race car(street stock), I was doing some motor work when the cops came by to tell me I was done working on the car for the day.

I have since moved to a new city and live in a HOA community. (most communities in this area have HOA's) I am amazed on what a good job they do of keeping the neighborhood looking nice and keeping the property values up. If I were to get back into racing it would be very difficult to do in my neighborhood.

As someone else has stated, there probably is no going back. If the neighbor has reached its breaking point, there is nothing you can do to resolve the issue. Sort of the same thing with the people who complain about the track noise. Once they start thier complaints, the only answer in their mind is to close the track.