best solution would be to build your own from the ground up and try to secure a google, yahoo, or ask ad feed, if budget is not there to do that then this is an alternative which is okay with a little tweaking, the better ad feed you can acquire the more you will make, not many people will park with you if using a low paying ad feed, more traffic you control the easier it is to deal on getting a good feed, so that would be your biggest challenge getting people to park with you until you have secured a decent ad feed.