Neighbours ...Difficult situation please help!?

Your question is a little unclear.. It suggest the issue is a motor home and then suggest that it is an actual home. I guess it would depend on the laws where you live and the zoning laws there. Where we live there are laws concerning zoning, so people have to file plans with the local town before they can just build a house or a motor home. The purpose of such plans is for issues like this. Where we live you have property lines, but you also have to have easements so that utility vehicles and emergency vehicles can move about properly. It would appear that the doors to these properties do not only provide conflict between you all and your neighbor, but also might provide some concern if an ambulance or other emergency vehicle had to get people in and out of these houses. Where we live there are also zoning issues concerning the number of doors or windows to a property, mostly for fire safety, so it may be that your home is also in violation of zoning issues there too. If there is only one door for an exit, that could be a safety issue if there was a fire and you all had to escape. It might benefit you to put up security cameras, or set a video camera on slow play when you are leaving your house and it appears they might cause harm to your property. Videos are always a great help to police, it shows you are not just picking on your nasty neighbor. I think you are right in using caution with these people, narcissistic people do not often comprehend what normal people say or do to them. I think you need to talk to your council and make them aware of the problem, and then see what zoning issues you have and what solution the city can work out, not just to make living there in peace, but clearly for the safety of you all. Peace be with you.