Russell,
Game Server Networks does rent out FSHost servers for $2.00 a slot. I run a 12 slot server for $24.00 a month. They also give you a teamspeak server at not extra cost.
Here's their website, check them out. Just a heads up, most places will try to run it, but at a charge they think will be fair. I've had an offer of $60 per month to start, with a possible drop in price once they see the server load. So, be careful, and check out any places that offer this kind of service.
http://www.gameservernetwork.com/
