Changing my reply a bit.
Ammo is for certain a substantial investment for higher level skill ups in woodworking. I am at 59 having capped on Scorpion Arrows. My next step is Dark Steel Bolts. Considering the heads are 800K+ a stack on Hades I am stuck for a while.
Looking at the other options at my level there is nothing else worth skilling up on. The cost of Rosewood lumber makes the Angle's Flute more expensive than Dark Steel Bolts to get the number of levels I desire. Being a Ranger at 52 I am going to need the dark steel bolts. Many of the the synths have high level alchemy or Goldsmithing as a sub which is not going to happen for me. I could try Ebony lumber but again cost is a major issue. Waiting on broken tarutaru fishing rods is not time effective.
Shihei is good for making money but that assumes a lvl 29 Alchemy and level 45 woodworking to make the bast parchment. Buying the parchment is expensive to say the least.
One elm log will run you about 10K on hades. that log will only make 2 stacks of shihei. The ink is going to cost you around 30K to make depending on what recipe you use. So you are looking at about 20K per stack to start out. Since Shihei normally sells for around 20K you are breaking even if you can't HQ at least one piece of the puzzle.
For the OP's benefit, I would suggest getting Lumberjack as soon as possible then head into Carpenters landing and Make Arrowwood Lumber and Ash Lumber until your head spins. You should be able to make anywhere from 3-6K profit on arrowwood and 4-8K profit for ash (per Stack). This is with very little investment. It will take some time to make any real money but in one afternoon (4 hours) I made 250K just off of ash alone. 25 stacks at 10K each in Jeuno at the time.
Here is the bottom line. You need to read all the guides. They were written to guide you along.

Then you need to look at your available funds, what the prices are like on your server, and figure your best option.
I would also suggest you level alchemy. I did and made money all the way. I never lost gil on alchemy.

~Shishimura~ (Hades) Bastok Rank-5
Woodworking-59|Lumberjack
Alch-54|Smith-40|Gold-21|Bone-16|Cook-10|Fish-6|Cloth-3|Leather-1
RNG-53|WAR-37|NIN-27|MNK-23|THF-15|DRG-13|WHM-7|BLM-6|BST-3|SAM-1
{Empress Hairpin}O {Bounding Boots}O {Fransisca}O
Ranger AF [O][O][O][O][O][X]