Buying whole cabbages and whole pumpkins is more economical. The trouble with that is that they have to be eaten, night after night, even when having large serves of them. They just aren’t the most appealing vegetables and no amount of collendar work could convince me otherwise.
I have a strategy which helps a bit. Include a generous amount of corn or peas on the plate with them. Some sort of gravy or finishing sauce with the meal is a must because it makes eating the cabbage and pumpkin more likely.