After saying this 3 times and not getting an answer, suddenly the sellers are calling them and they need to answer right away, and hang up on me.

Yeah, 1031's can be confusing until you get the hang of them.

If an handy man cant open a toilet box he need to hang his tools up.Have you ever installed a toilet? 

The only thing we probably didn't do was tear out walls.

Hello, hope this isn't too long of a read, but I was curious what everyone thought about this situation: During turnover, rather late, I noticed the tile of the shower was cracking along the grout lines, and I noticed it had some give when I pressed the walls.

You could add insulation between the walls but that will not stop vibration.I would tell tenants not much you can do. people have the same issues in apartments.

Maybe some wall units instead?

Who doesnt run their pex on the outside of walls and cabinets....lol

The problem with this, is you don't know the extent of the damage concealed behind the walls. 

Stop hanging out with your deadbeat buddies who spend all day drinking, talking sports, and otherwise wasting away.