It's the flooding problem most of all. I'm in one of the few Manhattan co-ops that still allows washing machines and dryers and it's a wonderful thing to have it in my apartment. But many landlords, co-op board and condos don't permit them because of the flooding.
Sodium acetate or hot ice is an amazing chemical you can prepare yourself from baking soda and vinegar. You can cool a solution of sodium acetate below its melting point and then cause the liquid to crystallize. The crystallization is an exothermic process, so the resulting ice is hot. Solidification occurs so quickly you can form sculptures as you pour the hot ice.
Choosing a Dry Ice Cooler. You can choose to use the cooler you already have if you want to use dry ice. The trick is, you may need to add blankets or newspapers to the cooler to ensure that the dry ice stays cold as long as it should. It is also important to keep in mind that your cooler must be full. Dry ice works best this way.