I am thinking about a way to stay in touch with friends from college and many people don't have facebook/twitter/etc so I wanted to make a very minimal website in which users can login (username / password) and post links to websites or just post text. Ideally it would be forum style and I would like to host it from a home computer. I have minimal experience with Ubuntu but think it is possible. Here are my questions:
1.) If 20 people log onto a website that I am hosting from a home computer, will that use a lot of my internet bandwith?
2.) Other than a static IP and Apache server, is there anything else I need to install to get going?
Any other info that can be provided is appreciated.