All I know is that I'd utilise a rig mostly to play Bethesda titles like Skyrim and Fallout 4 at maximum settings with heavy mod usage (ENB, graphics mods, large scale retextures, city expansions, to name a few mods in mind). Other notable games that come to mind are Frontier's building simulations and tycoon games, such as Jurassic World Evolution and Planet Zoo, which are designed to run well at maximum settings.
Given the current state of affairs, I'd suggest a budget of roughly $1000, give or take. I'd prefer anything with a payment plan, but I'm just getting my feet wet here and figuring out where I need to start. As a result, I've come here in the hopes of receiving some comments and insight from people who actually know what they're doing. Any assistance or suggestions would be greatly appreciated.