@realDonaldTrump and #JaredKushner I realize that both of you are relatively new to the housing rental business. #Rats and #Roaches do not generally take up residence in homes where there is not a good food supply (such as, open foods laying out for long periods of time.
In large building complexes where there are many tenants, it only takes a couple of them to attract unwanted #varmints into the entire building. And if you think you can just gas the one or two apartments that may seem affected? Think again. You gas the one apartment, they simply go through the walls, ceiling, and duct work into many other apartments.
You must gas the entire building, which then is only a temporary fix, if you do not maintain a clean building.
Otherwise, mice and roaches are not attracted to clan human living spaces (except as a the shortest path between two points). They usually only interfere with humans when humans have taken their natural living spaces.