I like the idea. Here is an example of what I mean by "one commodity at a time": You are a company that requires paper. You approach the paper-making company and buy paper from them. You enter into a lifetime agreement with the company. The agreement states that you will buy paper directly from them (you mention the amount of paper you need in a typical month) for the next 20 years. On the other hand, the company invests a part of the profits it makes by selling you the paper into a healthy fund. To generate more money, you cut the middlemen involved (packagers, movers, retailers, etc.), which reduces the cost of the paper you buy. However, you still pay the full retail amount to the paper company. The company then uses this additional money and invests it. The returns might not be as great as 227%, as you suggested, but pretty good for a company since it can invest more than a regular person. You keep buying (say for 2-5 years) by the retail rate until you invest enough amount. The company tells you that for the amount of paper you use, this investment is sufficient. After that, you don't pay for the paper. The company provides you with the required paper for free. If incidentally, for some reason, you need additional paper, you only pay for that surplus amount, that too, with the wholesale rate. The interest that your investment generates is enough for the paper you buy monthly. Towards the end of your agreement (after 20 years), you can decide to continue or terminate it. Upon termination, you get your invested amount back. You can transfer the invested amount to another company (a company that makes paperweights).
One commodity at a time is more feasible than buying everything from one company since that one company cannot manufacture everything you need. Therefore, it will buy some of the items you need from other companies and they will have to pay for that third company's profit. This will dilute your investment.
Moreover, the one commodity scheme is good to test the markets. It will tell you what happens to your investment and returns during recessions and price hikes. After you have tested using one commodity and tweaked your algorithm to sustain the agreement, you can go on investing in other commodities.