This Omega stuff requires a godly level of patience. I hope EA allows us to sell them in the Trade Depot. I think maybe they will someday.... but then 500 for 3 parts?? no; not interested.
1. You must concentrate on increasing your storage to at least 30 to play comfortably(somewhat).
2. You must wait for that one bloody item required to pop up in the mall.
3. While this is happening also manage your neosimolean count, it should not fall below the cost of your highest priced omega item. Chances are your desired item will appear when you are low on neosimoleans. The difference of price between 2 items may vary drastically as in my case (pic below).
4. Also very important, build your storage first and then build your omega homes. The more your income increases the more outrageously priced the Omega items will be. And the item's cost will always be more than your income. At higher incomes, you get screwed up more often with prices increasing at a high rate.
7000 bucks is a huge amount for a single canister. The items pile up really fast, once you invest a decent amount into it. My take on this is do not attempt unless you have a decent amount to splurge on it, the perseverance to wait for 6 hours, and limitless hope of getting the items you desire to accept while getting spices and bricks.