Anyone tried Radio Advertising? US

Every website needs a bit of SEO,

I have a new project for property listing Rent Buy House www.RentBuyHouse.com

I find that most people that come to the site are what i can call the consumer clients, people looking to rent or buy properties but for me to make money through listing, i need paid listings.

I want to try out radio advertising in the US,

do you guys think it will be worth the investment.

I will also consider outsourcing the entire operations of this website.