You can find out more info about self-hosting and how to install 1.0 in the docs: https://docs.ghost.org/docs/getting-started-guide

Digital Ocean also has a droplet with a pre-1.0 version pre-installed and ready to use.

I think the parent comment is referring to the open source code which you can self-host for free. You just need to pay for the metal/cloud that runs it.

See: https://docs.ghost.org/v0.11.9/docs/getting-started-guide/