You usually just do colocation. The data center will give you a rack (or space for one), an upstream gateway to your ISP, and redundant power. You still have to

You usually just do colocation. The data center will give you a rack (or space for one), an upstream gateway to your ISP, and redundant power. You still have to manage a firewall and your internal network equipment, but its not really that bad. I've used PFsense firewalls, configured by them for like $1500, with roaming vpn, high availability, point to point vpn, and as secure as reasonably possible. After that it's the same thing as the cloud except its physical servers.