I am in the beginning stages of starting a website based on membership. I want to charge a small annual membership fee, and also charge for any face-to-face gatherings we may have. I also want to provide my members special perks for different levels of membership. I want to eventually make this my full-time job. What do I need to consider? Are there any websites that have been successful this way? What can I add to my website that may bring in sustainable profits?