Question About Phone Sales

I'm working on a low-cost, simple ad program and want to reach business owners. Can I myself, and possibly some skilled reps try to reach them by phone and sell them directly if we can establish credibilty and sell them well?

The reason I ask is that I work part time doing telemarketing and THIS IS HOW WE DO IT EVERY DAY. I'm thinking, why can't I do this for my own program?

Please advice, thanks!