When they pay the rent, they help confirm my belief that I am a pretty good judge of character and that most of the time I make good financial decisions.

I haven't invested with either of them nor am I affiliated but I thought well of them and their characters. 

Withoutknowing the details I can not suggest which would be right to add on.Several you shouldpay attention to are:- Ordinance & Law: Provides additional building coverage to deal with rebuilding costIncreases due to changes in Zoning or Building laws- Personal Injury Liability: Libel, defimation of character, wrongful imprisionment, etc.

The home is an old mill home built in 1908, so it's old but has good character.

But there is no way it would fetch enough rent as a long term rental as renters would not appreciate its character and history, and I don’t want to fix and flip.

Each room has a lot of character that appeals to renters.

For example, a blog post on how to stage your home for a quick sale, or something similar.Add a Facebook Pixel to that post.Run an ad to that post.Re-target those who have visited that post.Always enjoy chatting about FB Ads so don't hesitate to send me a message.Good luck!

These are old neighborhoods with character - stuff like this tends to stick out a bit, for better or worse. 

Take pictures.Judge the character, intent, knowledge, and litigiousness of your neighbor. 

Otherwise, all you can do is non-renew their lease when it comes up for renewal since they have demonstrated poor judgement and character.