[McAttack]

Wow, crazy dude. It's a lot of work, let me tell you. Firstly, decide what type you want to do. Mainstream site or niche? I'd recommend niche. It's very expensive to make a mainstream site because you have to cover so much and compete in a huge market.

Think of this. Plan your marketing (banner spots, text links, all that) for 6 months. Plan your bandwidth costs. Plan your content costs. Plan your design costs. How much money will it cost?

Then look at how many sales/day you make now with the traffic you currently have that you're sending it to sponsors. If you were to send it to your site, could you make your money back?