If I buy a large chicken it feeds 2 adults, 2 kids as a roast dinner (but I generally do sausages aswell!) then maybe some chicken sandwiches the next day and then I put the carcass in my slow cooker and make chicken noodle soup I get about 4-5 servings from that but I'd struggle to make it do a week!!!
I got a Turkey cheap after Christmas tho we had 2 roast dinners
1 curry for freezer
Turkey and ham pie for freezer
Turkey and cranberry risotto
Turkey and chips
Sandwiches etc including Turkey, pesto and red onion panini
That we had for about a Week it was ok but repetitive!!