All you need is a regular audience of visitors and you can make money. Take PlentyOfFish.com for instance. Revenues of more then $5 million per year, all ad-driven.
I'll put some ads for now. At this moment, I have no business model. I guess time will show what's best to do
Adsense has been terrible for me every time I tried it. What's the typical per user return that you guys see?