https://www.tomsguide.com/us/best-ga...view-2219.html

Remember though when you skimp on older hardware, you need to upgrade sooner rather than later and some motherboards aren't compatible with some videocards and vice versa.

You could probably build a good pc for 800ish, but you would need to do your own research. It's not that hard.

As for res, high res is nice, but it isn't that huge of a difference on small screens or low texture games. Frames is way more important if you want to be on your A game. I play XIV in 120FPS and it feels like an offline game, so smooth most of the time.