Here's what Max posted about expenses in the other thread:

Rough numbers, but The Mudcat costs about $375 per month to run. Broadband with upload speed is the biggest monthly expense. The google ads provide an average of $150 per month. Contributions and Auction average about $50 per month, and t-shirt/badges is a trickle.

I got the cost down this year by consolidating servers to reduce electricity, but did have to purchase a new Server and DSL router to handle the load.

Most years, we're close enough to breaking even that it doesn't matter to me. We've never made more than we spent.

If I moved the google ads to the top, I could probably do much better, but I've always wanted to avoid making ads overt. If it pays the bills though, maybe I should.