Multi Family Home questions? Good vs Bad deal

[Ricky Priester]

I am looking at a multi family unit in a bad area of North Charleston SC.  Its a 6 unit building with 3 beds and 1.5 bathrooms per unit.  They are currently all rented and bring in $4600 per month.  55,450 per year.   They are asking 600K for the property.  

This is not my area of expertise, can someone please advise.  What makes it a good deal/bad deal?  What do i need to look for?  ETC?