I have a trip planned for next April and have a GOH cert.so breakfast is covered.
From all that I have read it really depends what type of eater / drinker you are. Some people have a late breakfast and can skip lunch and then eat a decent meal at dinner. You'll have to run the numbers yourself to see how much an a la carte dinner might cost you vs. paying for a dinner meal plan. And remember, drinks are NOT included in the meal plan.