It also depends on how quickly you can learn how to take advantage of the patch.
In harvest, I was selling crafts from day 2 onwards. People were paying a lot of chaos/ex for simple add/remove, augment, remove crafts which were very common to get.
Even though I'm the slowest at levelling, I think I made at least 15k fg in 4 days, no exaggeration.
How quickly you adapt is absolutely key. Also, how quickly you can find arbitrage opportunities, and there will be plenty considering how inefficient/imperfect the market will be, and how price discovery is gonna create large swings in supply/demand prices.
If you've always been slow in school and take longer to learn something than your friends, this strategy isn't for you.