Honestly, you're late to the game. I visited a website with the same business model last week. Also, in my opinion, WordPress wouldn't be the best way to implement such a site. Ideally, you'd have member logins and so forth, which are best handled some other way.

Yes, it's great to try a startup. And many projects have succeeded that weren't first to market. But don't forget to research existing solutions before reinventing the wheel. Look at how your competitors do it; and ask yourself how your site will compete, given their head start. Maybe it can, but look both ways before crossing the street.