Zenbook Duo is not an option for me unfortunately (company provides the laptop).
A nice large monitor not an option neither (well, if it was up to me, I would get 2 nice 4k monitors, but wife was very clear she did not want a bulky monitor and me occupying a good chunk of the dinner table lol).
But I am pretty sure she will be fine with a portable monitor, I didn't know these were a thing, and they fit my use case perfectly! Thanks a lot!