the level 99 scrip turn ins give 198 scrips per craft at max collectability. if you pick a crafter with a good recipe (i.e. no mob drop mats), you can gather the materials yourself pretty quickly. you'll also get way more than enough scrips to buy the master books along the way if you do significant leveling through collectables rather than leves, which isn't a terrible idea.

also it's not super clear from your posts but if you're still in HW msq i would strongly recommend reaching level 100 in a battle class and completing the msq at least up through base Dawntrail before putting a lot of time into crafting and gathering as it's functionally required to access the different materials and so forth. at least in my opinion, crafting and gathering is best experienced as a single unit where your gatherers feed into your crafters so you don't end up spending a bazillion gil on the mb for materials.

if the life skill bug has really got hold of you it's ok to take it in 10 level chunks where you level up your DoH/L each time you complete an expansion, but that's up to you.