alt Hacker NewsDepends on how in-house you want to go. If you go full in-house, you'll need sales staff to make deals with advertisers. You'll then need a way of hosting the media provided. You'll need a way to deal with media that does not match what you've requested. You'll need a system to allocate ad space accordingly to contracts with ad clients. It's like a whole new department in your company.
I don’t have a sales staff. I just call a company, tell them why I’m calling and what’s the opportunity, crack some jokes, get serious and make them an offer. It helps that I’m in a niche, thoroughly know the sector and that they most likely already know my websites. As long as I can get to the owner of the company, then I’m golden.