I'm going to be starting with around 10M cash and I'm aiming for around 100M via flipping. I know it's going to take a while as I'm starting with quite a low amount.
If your patient i would invest all the 10M in ranging potion since after the 2x exp weekend everyone sold Potion but they will raise back, they already started. I invested over 90M alrdy.
I'm not really interested in merchanting, I don't want my money tied up for that long incase I need it for something, that's why I'm going to be flipping .
There's a pretty standard list of items that you can generally flip, find a few off that list and try to get 2-3 fliips in a day for max profit. Flipping is steady profit, but not a much a merchanting.