Creating Vacancy Sites? - An Idea.

This is pretty much an online method but i've stuck it in here as we've got a good bunch of members in the offline section who are extremely good at helping others and putting opinions across. I've just had a quick think and wondered if creating vacancy Websites I.E ( Jobs in Mexborough ). Get a slick domain, do some decent SEO on/off site and see where it ranks, and adsense the shit out of it? As i'm sure these types of sites get huge traffic. You'd basically be looking at other vacancy sites and copying relevant vacancies onto your site? Obviously just a quick idea i've put together which has probably been tried a million times. Stick adsense on site and you're away to go? Thoughts.

I guess it could work if there was enough search volume for that particular region that you were targeting although I would think most of the Adsense ads would be those BS work at home offers which I don't think pay much per click but I could be wrong.