I'm curious as to how anyone racks up enough gil that fast to make enough to buy 750k worth of materials... in the first week or two after launch on a non legacy server.
I can actually provide some insight here, which can be corroborated by pretty much anyone on my server who was leveling nonstop to 50 combat during the first week of the game.
Exactly one week after early access started, I hit server-first GSM50 and MIN50 (I actually just did exploration xp to carry my miner most of the way from 49-50). I'd taken a few days off of work to facilitate what I figured would be the launch of my last MMO. Never done anything like that before, I wanted to try being one of 'the best'. That involved some enormous marathon mining sessions with old episodes of Whose Line keeping me company. By the end I had a metric ton of Electrum Ore saved up.
I sold HQ electrum jewelry on the markets for 29k each, and offered them at 19k/ea or 90k per set of 5 to folks who purchased directly. This is a sticking point for some people I guess - they say I was ripping people off or deserve to be banned or what have you, but I didn't even start offering the 19k until I saw how fast they moved for 29k on the market boards. If folks will buy, I don't see how anyone can tell me to stop selling or that I'm playing in any way not intended by the devs.
By the time electrum gear started slowing down and other GSMs caught up maybe a week later, I'd made a bit over 2 million gil. I sold maybe 15 full sets and lots of individual items. Around that time is when the first RMT spam started showing up in cities. By that point, even if I had thought it was ok to buy gil (I don't), I wouldn't have needed to. I had all the gil I'd need to finance my crafting pretty much in perpetuity.
With that gil I was able to afford the items for the Sanguine Scepter - I fumbled there and asked too much in the beginning. I consequently didn't manage to sell more than one or two before another GSM caught up - I still managed to make somewhere around 2M in profits on those. At that point I was at about 5M - enough to start considering dropping 750k on philosophy materials. It was exactly the kind of crafting endgame challenge for which I was prepared to risk a small fortune.