Honestly, you will save yourself enormous amounts of gil if you level your miner and botanist to 60 first. I would also recommend leveling a miner retainer and a botanist retainer. That way, you can gather everything yourself without having to rely on other people or paying on the MB for your supplies.

As for crafting, I did most of my 1-50 leveling using leves. Then, from 51-56 I did a combination of mass crafting certain items (such as Mythrite Nuggets on GSM/BSM or Rainbow thread/cloth on WVR) and leves. At 56, I stopped doing any leves and did all the rest of the leveling by crafting collectibles and turning them in. It's massive XP plus blue crafting scrips which are used to purchased your Master 3 and 4 tomes.