How did you get enought profit/day to be able to get them? I can't break the 100,000/day mark.
I built a recycling center and a trade depot (or was it a storage depot?). Built addons for the recycling center to filter alloy, plastic and metal. Those materials were shipped to the trade depot and stored. Once it was full, I selected EXPORT and made ~$192k. I left it on and its making around ~$120/day.
My map had no natural resources so it took awhile to accumulate population and trash