What would be the best solution (Performance wise) if one is only after running Photoshop + Office? Looking for a solution which is easy to install and configure.

If you want easy, this is not for you. Setting up LG first requires setting up a VFIO Virtual Machine.

As for how viable it is, very... we have many members in our community that are using LG for productivity applications. For performance, very close to bare metal. In applications like Photoshop and Office you wouldn't be able to tell the difference.

I used to use looking glass (still sponsoring the project) but since my hardware is ancient I tried running the windows VM of a DVI to my monitor instead, and it's been so incredibly smooth along with Barrier ever since, with more horsepower I would probably go back to LG because of the convenience of being a regular window I can manage however I want.

Is the key feature clipboard sharing? Otherwise I don't know why I wouldn't redirect events with zero additional software. As-is, I press both ctrl keys and my keyboard and mouse switch to the virtual machine. The big nuisance is that I need to switch monitor inputs. That appears to be something I can automate, but simply haven't yet.