A good compromise may be to take the damage deposit as payment to square everyone up, than advise her she should find a new place to live and  just make the best of a bad situation and move on.

It allows you to get a new number that records voicemails, sending notification to your email or text, allows you to access it anywhere, and uses an app from your phone to call back using that same number so your personal number isn't used or compromised.

The electrical needs to be completely ripped out and redone, the HVAC ducts are completely missing, the foundation is compromised (a few of the footings crumbling), the plumbing needs to be redone and brought up to code, the lighting needs to be brought up to Title 24, the lot coverage appears to be above the 25% maximum for Tahoe Regional Planning Administration.

The problem with roots in the sewer line is that the line is compromised, and anything you do will just be a stop gap solution.

Because then you'll either drive yourself nuts with the distraction of worry or compromise.  

The moment it finds it's way into a structure and if allowed to stay, the dwelling becomes compromised and will continue to degrade. 

I would never do a bad deal, just not exactly what I'm looking for...it is all about compromise...

Probably best that you negotiate a compromise in that situation.

I think you are going to have to compromise on something.  

I think there's room for compromise, but I also wouldn't say you were wrong to increase the rent to market rate if that was your decision.NOTE: I am not a lawyer and not familiar with the landlord/tenant laws in New Hampshire.