Honestly, i doubt it is that hard to get 5 million a week.
First i suggest you figure out what method you would like to make money from, if it requires next to nothing to start then merchant in the ge, flipping notes is the easiest. I make 700k a night now with 8 mill cash. Don't be stuck up on what to buy, almost all items buy and sell. If it takes money to start keep that money on the side and merchant with the rest of your cash.