What if you are a retiree and can barely make ends meet?  Are you going to have to sell and live on the street because you can't afford to pay $133 more a month?   Many of these people don't care about property values because they thought they will live in their unit forever.   And the cost varies, marco polo has many units so the cost is spread out but what if your building has less units?  The cost could be ove $20 - 30k for them.