How hard would it be to launch an Advertising network (putting technology aside)

OK, so I was curious about how hard it would be to launch yet another advertising network. Nothing major, just joining advertisers with publishers, etc.

Any ideas on how to do this without spending too much money on publicity and promotion?

 

It would be tough. I've done major research on it a couple of months ago.

The main problem is you get a billion publishers and not enough advertisers, then you have too many advertisers, and not enough publishers. It's totally annoying and difficult. Also there isn't much room for another ad network.

Not putting technology aside, its has impossible to get a professional script with doing it yourself or paying someone $4,000 to do it. Another thing that annoyed me as well.