Thanks for the reply. Maybe I wasn’t clear or I’m misunderstanding you, but the good pc is going downstairs hooked up to my big tv permanently. Im looking for whatever would be easiest to put back into the office hooked up to the monitor in there for my wife to use when she needs to type stuff for work or wants faster internet browsing, as in tabs opening/swapping, then she gets on her slow Chromebook. She just wants to sit at a desk and have snappy efficient usage as if I had left the expensive desktop in there. Fiber 100gig up/down on eero mesh WiFi that has those speeds throughout the house.
something like a Nvidia shield might work, although I am not that familiar with those. I tried moonlight if that’s similar but it was from the pc to an lg c4 which I’m sure is weak compared to the shield.