You can now deploy/scale/upgrade a single server using anyone of dozens of community BOSH releases WITHOUT needing BOSH server running.
At the time of writing there are 33 community releases at https://bosh.io/releases. Many are suitable candidates for deploying to a single server.
Why don't we need a running BOSH server? There is a new CLI coming soon called bosh-init
- it can deploy a single server into any BOSH-supporting infrastructure (e.g. AWS, OpenStack, vSphere, vCloud...), install and run one or more BOSH releases' job templates.
bosh-init
can do more than that - it will attach a persistent disk; it can resize the disk later; and it can even resize the entire server - change to any instance type over time.