I haven't posted in this thread so far, because, basically, I can't understand any of Zudo's posts without spending a lot longer deciphering them than I want to spend.
24-30 always seems like a tough time, because you have just finished the rapid levelling path in Paludal, and have to search for your own preference from several candidate zones, all of which are mostly empty of people, and then level 25 takes about 5 times as long as 24 did. That's just how it is, I am afraid.
You can stay for the full time from 24 to 30 in one zone, and in fact it will seem a lot faster if you do that. Switching from zone to zone every play session will make levelling a lot slower - but it may also be more fun, and you get to explore, something that just doesn't happen while Paludal is the place to be.
Personally, I always found Echo Caverns needlites a good, if somewhat boring, path from 24 to 30. In the past, I have also grouped in High Keep, soloed in Warslik Woods, Unrest and Marus Seru, and even soloed and grouped in South Karana. Just pick one.
The best options for money at these levels are still the same as for a level 10. Butcherblock green goblins, skunks and krags; plague rat tails and snake parts from Qeynos; kobold drops from Steamfont; or spiderling/spider silks, pelts and leather padding sold in the Bazaar. This doesn't really change until you are level 39+.