keep in mind protein pills, or amino acid pills are rather large, and if they are 1000 mgs (1gr) of protein, you would need 6 to equal one egg or 8-10 to equal a glass of milk for example. not cost effective, or fun to swallow.
a protein shake however, can tatse ok and a scoop will yield 20-23 grams of protein (whey tatse the best in my opinion). this is very cost effective.