For protein we separate it into 5 meals for better absorption, however for carbs/sugar if you looking to gain fat, just eat them in 3 meals. So you body will store more fat.
Post workout if you have already hit the daily protein, you can just drink Milo or Glucolin to restore energy and surplus calories.

Perhaps you can take a read on this : http://www.jordanyeoh.com/2014/08/24/johns-transformation/

To see which type of "gaining weight & size" you looking for, although I always recommend leaner muscles, around 10-15% body fat.

And lastly, for me I think 0.8g protein per pound is kinda low for muscle building, I would bump it to at least 1.2g, as I assume not all protein will be absorbed by my body so I provide more, and protein has contribution to calories as well.