I believe one of the lowest gpus you can use with DE is a GT1030.
Knowing that, any 50 series GPU from the 10 series and up should be just fine with running aoe2DE.
Any modern CPU should also be good to run aoe2de, but you want to avoid integrated graphics if you want best results longer term.
Depending on budget, I would suggest perhaps a laptop, perhaps even used.
You can get a Laptop with a gtx1070(which is still viable in 2023 for 1080p gaming at 60fps in many titles) for $500 or less used.
And that’s the whole package since its a laptop and you can just use it docked if you want a sitting computer experience.
A used laptop with a gtx1060 can be found for $400 or less and that too would be plenty sufficient a GPU as well for 1080p gaming.