First, SQL Server isn't really all that "manageable" via Remoting, because it isn't terribly well instrumented for PowerShell. If you're following the book, you won't find any PowerShell. You're better off installing the SQL Server Management Studio on your Win8.1 machine, and having it connect to the VM. So long as you provide correct logon credentials for SQL Server, that'll work and it doesn't use Remoting.
Second, check out one of the free ebooks here (under Resources on the menu), "Secrets of PowerShell Remoting." Non-domain Remoting can be complicated, but the book covers it.