I looked into a bunch of things like this, but in the end I decided to just pay for a Boosteroid subscription (cloud gaming service). Works great.

Cloud gaming is incredible tech, I used GFN for a while and it was incredible.

HOWEVER, I will inevitably want to play weird stuff like "milk inside a bag of milk inside a bag of milk", Pseudoregalia or Civ V Lekmod, which these cloud services do not offer.

The other alternative is "rent a VM" systems like Shadow Gaming, but they're much more expensive, and have much worse latency and streaming tech. Also the questionable practice of putting the credentials for my precious steam account in a random VM in some random data center.