Estimated PPC for keyword 'CAREER' = $0.5
Cash paid for investment = $18,600
In order to earn back those cash, you will need 37,200 clicks. Let say your CTR hits 15% "very low". Then you will need about 250,000 visitors to break even.
In investment, it is a common practice to throw in cash for 2-8 years asset.
So, to see whether is it really worthed, you need to predict how much traffic can the domain receive in one day and compare it to it margin:
2 years: 347 visitors/day
3 years: 231 visitors/day
and so on......
Careerbuild.com has 920 OVT score with ext. That is very high. Most of the time, websites with ten of thousands of visitors will have that score.
The conclusion is: VERY VERY WORTHED