In my opinion this is a bad idea, It wouldn't be smart to promote this type of website on television, however everyone has their own opinion.
Anyways to everyone that says commericals are expensive, actually that's incorrect, from my personal experience I can tell you that television commercials are not that expensive unless you are wanting to advertise during main events or tv shows such as the Super Bowl, or American Idol.
You can get a thirty second television commerical from your local area for anywhere from $100 to $5000, however if you want a national commerical they'll run anywhere from $5000 to $500,000 depending on what you want.