This is for those of you who are having trouble making money and need some help with it.
Requirements:- 77 Hunter (the higher the better)
- 69 Summoning
- Completed Underground Pass Quest
---------
We're going to be hunting Grenwalls and Pawyas, you're going to need a fruit bat and 4 box traps (5 if you're 80+ hunter)
Your inventory should look something like this:

Now teleport up towards Camelot, run down to Catherby and charter the ship to Port Tyras. (If you have a teleport crystal you can skip this step)

Now run down the red route (or the blue one if you used a teleport crystel) be careful of traps and if you get poisoned have a sip from your antipoison pot. Once you're there you can drop the anti poison.
---------
Summon a fruit bat and set the left click option to your special move. Start spamming the scroll until your familiar runs out of spec points and pick up any papaya fruits that are dropped. Now place your traps in the same way as I did in the picture below. (feel free to experiment with trap placement, I found this way the most effective for myself)

Remember to bait all of your traps with Papaya fruits. You should get Pawya meat, don't drop this but instead use it to bait your traps and to catch grenwalls. With the above box set up I usually keep the left 3 boxes baited with raw meat and the two on the right with papaya fruits.
You can use your fruitfall scrolls while setting up a box trap, dismantling it or while baiting the trap if you get the timing right. This way you don't lose time waiting around. Always keep a healthy amount of spare papaya's in your inventory this way you can always keep moving. If you find time that you're standing still and doing nothing at this spot, you're doing it wrong.
--------
Now you might wonder where the profit comes from?
The obvious answer is Grenwall Spikes, you usually get 18-22 of them per catch and they sell instantly on the GE for the current mid price of 1507 coins ea.
Here's what I gathered from 1 fruit bat (45 minutes) with level 93-94 hunter:

They sometimes give herbs when you catch them as well. (Toadflax, Irit, Cadantine, Ranarr, Lantadyme or Dwarf Weed) I usually only keep a few of them since I like to have around 12 free spots for papaya's. Besides, they don't net you much cash when compared to the spikes.