At 3000 calories a day? A really, Really, REALLY long time!
You want a belly? A jiggly belly? Try 5000 calories a day and see how it goes.
You might try mixing up a pint of heavy cream, 8 to 10 teaspoons of corn syrup (it dissolves better than sugar), 1 pint of chilled coffee, and a squirt of chocolate syrup to taste. That will give you a 2100 calorie boost and tastes great!