they say you should never have given me permission to go on that dangerous land...

She's told you it could be dangerous!!!

Don't rent to criminals or those unwilling to pay their bills (shows up on credit and eviction records).b) It's 2016, collecting rent in person is not only impractical, but dangerous (case in point).  

This could be dangerous at times so be careful.

The easy answer to this question is don't provide inherently dangerous items to your tenant that may or may not be outside the ability of a reasonable person to operate.

Or is this dangerous territory in terms of legalities?

And as Marcia said, it's probably not dangerous mold anyway.What I'd do, is agree with them that the unit is not habitable, and therefore, the contract is not valid and so you must break the lease and give them all of their money back.I would not pay for their hotel.  

Whenever we are involved in an eviction, emotions run high and it’s a very sad and dangerous time.When we are new in this business we have a tendency to make a lot of mistakes and that’s only natural.

tell her, "I'm paying this time but if it happens again, it's on your dime." the danger is she doesn't tell you at all and it causes further damage.on 2nd hand, I wouldn't say anything at all. thankfully, she called you.stickers and scratches on the wall are not a big deal. just wait until you REALLY have a tenant hard on a house. :)

Since there is no clear answer, it's reasonable to assume that if a city department that manages the official declaration of oil tanks being decommissioned, saying that it has been legally decommissioned - then it has been decommissioned in a legal manner, approved by the authority over such things.And if the city is allowing the property to continue to function as a multi-family dwelling that is habitable and legal, and they have not condemned it as being dangerous, etc., then it's reasonable to assume that it is - habitable and legal.And since you did your due diligence, and asked the city about it, then you have not been negligent, either.These are the kinds of arguments they teach you in law school.