Now for competition diet I would just eat 4 cans of tuna a day and vegies.. no big deal.
as for sups go I also use vitamins which cost me at a discounted price of 65$ as oposed to the regular price which is 80$
It's not a question of willpower... it's also a question of food liking... few people know this, but I'm extremely difficult. I really don't like many foods, and what I like is generally more expensive. For one thing I don't like oatmeal. Plus, I'm very carb sensitive and bloat/gain fat like crazy on bread, pasta and potatoes. I also like my food to be fresh, I don't like frozen stuff. I don't like tuna either, can't stamd it! Money isn't an issue for me, so I'd rather spend 30$ more per day and eat stuff I appreciate rather than feeling like crap. I really wasn't complaining about the cost of a preparation, I was just making a point.
BTW, a guy your size would loose muscle mass like crazy on 4 can of tuna and green veggies per day... even with 4-8 scoops of protein powder.