Are there older photos you can review to see if its a stable condition or worsening.If it's placed concreted, it could've been a form blowout or perhaps they knocked the form at an angle. 

The plumber who installed the indirect hot water heater went over twice to address the banging, knocking, clanging pipes noise she claims to hear, and he told me he didn't hear anything and didn't want to deal with her anymore, as she was texting him daily and there was nothing more he could do.

As there is no interior pictures found anywhere (owner built the home), I was hoping to knock on the door with some cash and ask for a very quick tour of the home.

(And I'm also originally from MN - small world :)It was digging deeper into rental comps that made this deal look a little less appealing - the comps on paper were good but the dated interior would definitely knock it down a bit.The search continues!

A portion of the fence was knocked down and I am looking for a contractor to fix it.

I've even gone so far as to knock on doors of neighbors in a prospective neighborhood to ask them their experience there. 

[B] It seems logical to call both renters and:-- for renter [1] advise of the dog noise issue and say it needs to be less noisy, -- for renter [2] advise that #1 has been advised and to please call back if another issue.Also renter [2] might want to knock on the door of #1 and discuss the situation.

I entered unit after having knocked vigorously. 

I knocked on the door, no answer.

I knocked on the door, no answer.