Originally Posted by tom-knox
How much web space and bandwidth would a forum use in general, I'm not talking anything huge, just a community forum.
That is an unanswerable question.
It totally depends on the size, traffic, and content of your forums.
A small, low-activity forum like I had on one of my sites might use a few MB of disk space and not much more in bandwidth. Nearly any shared hosting plan could support that. A forum like DP Forums on the other hand, uses a dedicated server that cost $85,043.84.