I would like to thank you about your interest in our CMS and about the recommendations you do. We highly appreciate this!!
As for your question,
You will have two instances of the CMS, pointing to one database. Everything that gets promoted to go live on the authoring server, will be visible on the production as well, since the database is the same. You could disable the Admin access on the production if you want, and if everything will happen on the authoring server. The only thing that you should keep in mind though is that the two instances should be the same version of Sitefinity.
Let me know if I could be of further help!
the Telerik team