I'm at L43 goldsmith/L36 miner/L38 white mage and have about 400k gil so far (While still spending a fair amount on equipment, teleports, and donation to the FC bank). I've been able to occupy a fairly comfortable "2nd wave" niche where I've generally been a step behind the uber hardcore crowd (who are now 50 and doing end-game craft) and I end up occupying the markets they leave behind after they progress while still staying ahead of the casual folks who flood the market with stuff to the point where it's less profitable to sell a crafted item vs. selling its ingredients.

So yeah, there's more bases than I can cover and I can leave my two retainers with 20 items each on the market and 24 hours later come back with only a handful of items left on them (mainly stuff I've been undercut on or I'm experimenting to see if there's any demand)