With any investment a person has to really watch for what is not said, almost as much as what is said. In this case they left out a lot.
For instance they factored in the cost of the freezer, but they never mentioned its electrical consumption. In North Dakota where it is cheap, it is one thing, but in Maine where electricity is high, it is another. The fickle nature of electrical costs is probably why they left it out, BUT it is a huge factor. Here it costs me about $18 a month to run my freezer, so I have to save that much money in food costs to justify its existence. For my family of (6) that is pretty easy. However my cattle dealer, he said he has (4) chest freezers for all his meat and it is just him and his wife. He is paying almost $100 a month just to store his frozen meat. From a financial view he would be better off to buy it from the store or become a
vegetarian!
I advocate saving food for food security reasons, but not necessarily an investment. We have a years supply of food saved up here, but are not preppers or dooms day people, it is just good to have food just in case. Most of that is in the form of cans or canning jars so the cost of storage is free. Being a sheep farm, our meat is live on the hoof, and while I prefer to take it to a butcher, I have and can slaughter my own animals.
Another way is to find free food. It is EVERYWHERE! This is a topic onto its own, but it is the truth. If a person has an adventurous palette it is easier, for instance I once got packages of cows tongue, a meat I love, but few others do. And my Grandmother, living with a widowed mother with 5 daughters subsided during the depression by living on given food baked in wondrous ways. You have never lived unless you have heart sheep's heart braised in milk!
Still another way is to utilize coupons, coupons, coupons (or online redeem sources). You are buying food without really buying it.
The point of these two examples is, and there are many more, is that the best way to save money is to not spend money in the first place. It is like my wife coming back from a shopping trip and saying she saved $40 by buying a pair of shoes on sale. Of course she would have saved even more by not buying them at all!
The investment strategy given in the article has a fatal flaw, it means spending money, storing it, then reaping the benefits in the long term. That means it is a monetary gain by
profit margin. A person spends $4 on food, they store it, then a year later it is worth $6, thus saving the person $2. That works, but it is narrow thin margins, and assumes there is little loss, and little cost for storage...a BIG assumption. I advocate not spending money in the first place on food, because that is a 100% profit margin.
Of course if a person took this money saved, and thus invested it in the commodities market they would even do better.