I have an idea for a website that will attract many visitors.
I will need to put a lot of effort to build it,
but then it will run (almost) by itself.
What will be the best way to convert it to some passive income?
Advertising? Affiliates? VIP registration?
How much should I expect to earn from it?
Just go whatever your mind and heart tells you to do. It will turn out well once you are really up to it. Nothing is impossible so work it out like that last thing you'll ever going to do.