It will be more funny when your levels higher and higher in Metin2. So you can hunt metins in second village, to gain some books and stones.Also kill esoterics to drop rib or level 42 bracelet and curse books when you are at level 25-35.
Once your levels(metin2 gold) at 40. It will be harder but more funny. Then you can farm chief orc in nula, looking also for level 45 metins, or go in wasteland hunting level 40-45 metins (but more rare than nula), and snake tails+ from snake archers.
And you could go in v1 or forbidden temple at level 50-60. You can try to drop level 48-54 armors, also level up and sometimes go in DT.From level 40 you can try to scrounge some free upgrades from dt run tankers, upgrade your items without materials, don't abuse of it, respect tankers and don't keep unlock !!
So you can go both in tangra, looking for level 55-60-65 metins and nine tails, or in valkus, where you can find flame king and metins of murder.Those are really hard to kill, you need alot of speed and defense. Then do daily DT runs (like you was doing before ), valkus and v2.From v2 you can get alot of junk items to sell to trade vendor. With full inventory you can get like 2kk each travel. Also keep hunting bossed like nine tails and if you are mirage/partisan with P skills you can try death reaper.