Butternut squash and red lentil curry is cheap, as is any veg curry. Just leftovers curried. Baked beans, baked potato, home made soups, pasta, cheap cuts of meat slow cooked with veg.
I think that i you start buying WW meals and snacks it will really addd up, and I don't think that is what WW is really all about. It's about healthy food, which is usually home made, and restricting portion sizes.
Lynda