How to set up a test site?

[mike2902]

I am going to setup the second server at a subdomain address that comes with my server. This is the note I got from my host

Note that one free subdomain, in the form "s[9-digits].onlinehome.us", is
included as part of your package.

I would install vbulletin there. Then backup my site to that address to get the large upload done. Then right before I make the switch take my board offline. Back it up, then restore it to the server and switch the DNS. Does that seem ok. There would be a couple days when technically im running two boards off the same liscnese. But as you can see no one will fine the second site.