Pink Salmon is canned, fairly palatable, cheap, and very nutritious. I eat about a half can every day.
Go buy a turkey breast (a turkey without wings and legs) and roast it. It should be no more than $1 a lb, and weigh 8-12 lbs. After roasting, debone the meat, trash the carcass, and store. Do more than one and freeze the breasts after cooking and deboning for easy reheating.
Eat cottage cheese when you wake up and before you go to sleep for the slow protein release (casein).
Have a shake between meals.
Hard boil a dozen and a half eggs, peel them, trash the yolks, and mix the shredded whites with fresh spinach (the frozen stuff tastes like metal to me).
You should be able to do 200+ g a day with no hassle if you have precooked poultry on hand, canned salmon, cottage cheese, and eggs. Those are the protein staples of my diet, since they are cheap and I’m a student. If you are feeling extravagant on some nights, throw a steak on the grill or in the cast iron pan.
By the way, what protein are you using? Problems like gas are usually associated with cheaper protein powders. Acne should not be affected by diet, unless it’s diet related stress causing acne.