How to start own Internet Ad Network

Just like the thread title says. Or at least direct me to the right info on BHW

Try to explain it with more details.

What do you want (ad management program?
What do you have (sites, software)
What do you need (info about the software, info about ad management, what)

Sorry about that. Well I see that alot of banner ads for like example "Homevestors" are everywhere that I surf on the internet. Even here. I would like to do business here locally where I am from and at the same time offer online advertisement for the local businesses in my area. I was hoping maybe there was a possibility to do a "local online ad network" where banner ads of local businesses would be shown to individuals that log on here locally. I dont know maybe by Ip address would trigger these ads?