also, do you understand how web based advertising actually pays?
you don't just get people to visit a page with ads on and you then get paid, they have to actually click on the ad at least...if you force people to see ads they will leave your site pretty damn quick! I think you need to research this a bit more thoroughly, you will need a payment method, cart, hosting, ad account, site design and much much more. Plus to serve 200k pages depending on the bandwidth consumed would eat into your ad revenue, plus hosting costs etc. That $400 is gonna be more like $100 in the end.