Hosting for about $5/month
Just about any webhost should be able to support concrete5, so if you already have a hosting provider just ask them to help you install concrete5.
If you're looking for a good shared hosting provider that does well with concrete5, we'd suggest any of these below. We do have a relationship with each of these hosts so if they have some concrete5 specific question they know how to get ahold of us.
If you are looking for a dedicated server and support from the team behind concrete5, check out our enterprise site.