Commonly, not always. 

Can't tell what it is you are trying to say with all of the typo/grammatical errors but from what i can gather, you are trying to find out if bank owned properties are a good deal and what the process to purchase them is?

It is a small urban town so crime in urban areas is common but I'm not afraid to walk around. 

Not impossible, but far from common. 

If a LL is that short on cash they have other issues that need addressing   But the landlord should not have to pay for the tenant's error.

The property is in a foreign country (EU member) that does not seem to offer the kind of cost segregation studies that are common in the US.

They are not wanting these on Loopnet, but I think I am going to just try to get them to allow me to post there at least as that seems to be the common thread.

This might “expose their potential violation of their lease with the landlord, if they forbid extended stays by overnight guests who are not listed on the lease.The most common scenario highlighting this pitfall happens when a family member or friend allows another family member or friend to move in with him or her, sometimes accepting rent or help with paying utility bills, sometimes not, and the family member or friend who has moved in either stops contributing financially or refuses to move out in the time period agreed upon.

A lot can go wrong with a flip, and $900 is not a very large margin for error.

It’s very common.