eating over 5000cals clean is very hard...
i used to chow down 5000 a day in my early 20's, i was upto 285, but i had to add ice cream etc to achieve it, ive got a huge appetite too, but i doubt i could have done it clean year round
I did that back in college, hitting and exceeding the 5000-calorie mark. That was 15 years ago, in college.
But, as stated earlier, about HALF of that was via weight gainers (namely Mega Mass 2000). 10 ounces of that powder, mixed in water, was 1000-1100 calories, 55 grams or protein, 210 grams of carbs, and a gram or two of fat.
Three of those per day (one between breakfast and lunch, one between lunch and dinner, and one post-workout) gave me 3000 calories, give or take a few, and 165 grams or protein.
Unlike you, I was nowhere near 285. I had to eat that much, just to get from 189 to 210 that semester.