Single skillet or crockpot meals are a painless way to feed a crowd. You provide the ingredients, and the equipment does the rest. If you have the time to wait, you can assemble a meal and forget it until the tantalizing aroma draws your guests to the kitchen. It's a lazy way to entertain, which makes it almost ideal.
Another plus is that slow cooked dishes can take advantage of less expensive cuts of meat, so you'll be cooking great food and controlling food costs at the same time. Surprise entertaining can be an unexpected expense, and cutting corners with a crockpot meal is one way to take care of your visitors while minimizing the drain on your budget.