Second location is easy. Create a new location in your IDE account and then register a hub to it. That way you have access to both locations and hubs from the same Samsung account login.
Camera options are far more limited in ST for proper integration (notifications, motion detection, recording and viewing).
Arlo, Samsung and Ring are the natively integrated options. That are a few third party options for live viewing of cameras.
Foscam has a decent third party integration with motion detection, recording (in Foscam cloud/SD card/FTP/eMail) and live viewing that is also popular.