Gaining

if I drank let's say a 2k calorie drink everyday, would I gain a much greater amount, faster, if I drank say, 5 times that amount everyday?

At a certain calorie point, your body will just reject the excess calories, I believe. What number that is probably depends on individual physiology.

Not something I would want to do if I was just starting out.
Like he said everyone is different.
Your metabolism is going to be shocked with the 2000 calorie uptick and will probably try to even things out.and that takes time.
Gaining weight is not a fast think it takes time.