I was just at Salerno's in Mt Prospect yesterday. They have trays of various chicken dishes @ $30/tray(20 pieces-cutlets). You could get 5 of these, considering 3 pieces/person, which is more than enough, plus a couple of their pizzas, perhaps salad and or a pasta. This would be more than enough food and I think would be within your budget.
We got the chicken saltimboca and the chicken marsala....both very good.
If your party is in Wilmette, it's a 20-25 minute drive (no rush hr!!) down Lake Ave. to Mt Prospect.