The objective with this army is to have an opposition force availible.
I'm growing my warmaster group by raising kids...

I currently have Dwarf, empire, high elf armies; goblins are being slowly painted up (4 units of gobbos, 4 wargs done; 4 more gobbos and 4 wolf riders + characters on the painting table; 4 trolls and 4 half orcs on the to be ordered list); and the above chaos forces.
For my purposes, rounding out what I picked up cheap with chaos knights and dragon orges is good enough. The paint time to point value ratio on chaos knights and dragon orges is excellent.
Goblins are litterly a waste of time to paint.

But with the hobbit coming out in the next year or two, I want to get two boxes done.