I am another guy that deals with GPU but does not really know a ton of info about GPU, my thing is CAD for Engineering projects mainly. My boys on the other hand are into light online gaming.
We just put together a gaming laptop for one of the boys, but quite honestly they find themselves "renting" GPU/CPU bandwidth through gaming website servers or platforms. There is a big one out there for gaming that I cannot recall the name of that many access using something like a "steamdeck". That's about as far as my understanding goes.... Just that an option exists that is very efficient where you utilize outside bandwidth for gaming or tasks, leaving you without having to build an expensive machine to do it. They do this through online gaming platforms but there are also sites where you can rent based on spec, then you are essentially remoting into their infrastructure through your device.
It may be worth researching as an interim or permanent solution.