That's just it.. trying to build a new search engine to compete with the "big dogs" like Google, Yahoo, etc. is next to impossible unless you had a lot of money to advertise it. I would never recommend going after such a tough market.
Even if you were going to do something like this you wouldn't start out with a search engine. You'd create some kind of site that targets a certain audience (preferably Net marketers... but again another saturated and heavily competitive niche). Then once the site got popular THEN I'd try to add the PPC feature. You would have to find some way to build traffic to your site first.
The same principles would apply to creating any kind of other service. Gotta build credibility and traffic.
May I ask why the interest to tackle such a monster?
