Hi Danny,
I would upgrade and install SQL 2014 Express. you will also need the SQL 2005 backwards compatibility.
The trick to install SQL 2K8R2 and later in a non domain network is using the default instance during the install, choosing the advanced login method(Windows and SQL Authentication) and enabling the correct protocols after installation.
Give me a call if you need help 800.608.1218 Xt 404