Hi, i made my allod not long ago and it took me a couple of months to build it. I did the easy dailies (2 or 3, depending of the day) each day. Sure, if you have a decent equipment you can do the cave to speed it up but the other dailies take less of your time.
The horns can produce a nice amount of gold i guess but at the start you need 2/3 to build other resources.
Also, there are 3 daily quests that give a little more of 800 gold each, but may not worth to do them, unless you do them in the waiting time from one astral allod and the next one, or while wait until the next pvp match.
Aside from gold, there is a weekly (i think it is) repeteable quest that give you some extra dust (the one you get from astral allods).