If you want to maximize calories, then you need to buy and eat fattier foods. Eggs are 80% water, which means 80% of the money you spend on them is essentially buying water. This is true whether you're buying high quality organic eggs at $6/doz (which is expensive, I can buy very high quality fertilized organic eggs here in VT for $4/doz, or at most $4.50/doz).
Here's a table I just made from a series of calculations. The goal is to estimate the cost (US$) per 100 calories of each food. I assume eggs are 90 calories each and used the costs you presented per dozen. I assume bison suet has 240 calories per ounce, which I got from the internet. I assume conventional ground beef yields 300 calories per 4 ounce serving, and that organic yields 240 calories for a similar serving. My most recent order of bison suet cost me $4.50 per pound delivered, and I used $3 per pound and $8 per pound for conventional and organic ground beef (I haven't bought either of these products in a very long time, so correct me if these prices are out of line).
The table:
Food Cost per 100 calories (US$)
Organic eggs $0.56
Conventional eggs $0.21
Conventional ground beef $0.33
Organic ground beef $1.11
Bison suet $0.11
Obviously I can't live on just bison suet, I'd have to eat a little meat each day, maybe 6-8 ounces. But if you want high quality calories (and grass fed, grass finished bison suet is loaded with vitamins and minerals so it isn't just calories) then bison suet is the cheapest way to get a day's worth of calories by far. Assuming a 2000 calorie diet, that's $2.20 per day. I practice caloric restraint and usually only eat 1000-1500 calories per day, so my costs are lower. Much better than eating eggs, and you don't have to bother with the whole avidin antinutrient issue, the availability of fertile eggs, or whether your eggs are polluted from being raised in a factory on solely grain.
