I don't think this is a game where longer term, crafting will be hugely profitable. I'm not saying you can't make money doing it - of course you can - but it won't be like the FFXI crafting system. I feel this way because:

- It's not particularly difficult or expensive to level a DoH or DoL job (comparative to FFXI at least)
- Many of the best in-game items are dropped, not crafted
- There is a much lower degree of luck

Some FFXI items had a <1% HQ rate and were the best items in their slot by far. The NQs sold at break even or loss but HQ was a huge profit. This was also because each character could only max 1 craft. In FFXIV you can max them all quickly and few top level crafts have difficult to obtain ingredients.

I craft because I enjoy it, and make some money for now, but I expect prices, particularly on top level items, to fall rather than rise because more and more people will be capped to craft them. For that reason - I undercut till it sells.