So these are not the same wifi networks at all.
You probably should simply reset your router and use it in the standard router mode. This nearly a default configuration, except that you will use a wireless WAN that connects to the hjx8 upstream network. Then you will have a LAN that can be used for both your wired and wireless devices (use a different SSID for your own LAN). With all of your devices on the same network, sharing will be easy. But you'll also have the benefit of preventing your landlord or others from connecting to your machines.
The Travelmate package makes this pretty easy to accomplish.