So guys... I am going to tell you how u can make a basic for all crafts 60 - 100 with only 1.200000 starting money.... it´s simple and easy....
So.. I write down how "I" made it.
You farm items sell it and try to get 1.2-1.5 million gil (depends on the server). Then.... Start cooking and lvl it to 100 ( it worked for me so I believe it shouldn´t be impossible for u... just buy all your integriends from NPC´s)
. Sell everything.... cheap things to NPC´s... expensive things in the AH.
If you got Cooking at highlvl... make Sole, Squid, Tentacle Sushi ect. and all of those +1. then sell it.... Sole sushi+1 = worth about 300k at my Server and I swear it sells like hell.... so you can make about 1 mio in 2 hours without any problems... (if you can HQ it of course).
Now make this a few weeks... in the time those Items sell ... start crafting your fvourite Craft to 60.... if you got it..... craft subcrafts to 60 as well...
so if all crafts you need are at lvl 60 and cooking is at 100.... try to SAVE your money till you are sure you have enough to make your favourite craft too 100 as well....
I made Goldsmithing so it was long way for me to save my money... (about 400 million gil).. takes me 3 month to get it... but finally IT WORKED.
So now u want to know how I can have 100+6 Goldsmithing right? I DROPPED COOKING after I was sure I have enough. and lvled Goldsmithing... now I can make much more... and I can make my favourite craft.
And a last tip: Spend 1 hour per day to craft and check the Auction house... (farming and crafting is much better then only buying items in the AH) and you won´t have any more problems with gil 4ever..
Hope this may helps a few ppl who haven´t known it..
And please forgive me for my bad english at least

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Have a nice day and enjoy playing FFXI