To answer the title, I don’t think “budget audiophile” is an oxymoron.
A few years back I sold some speakers to a guy who wanted a demo with his gear at his residence. I took a trip, demoed the speakers and then listened to his budget home theater and DIY sub. In the midst of his semi-hoarder home I was absolutely floored with how great it sounded. Placement was dialed in, settings were refined within his receiver, and DIY and creative treatments were strategically placed.
Went home, found the exact same test tracks and scenes, played them 7-10 times, minimized the experience earlier in the day, and then weeks later realized how humbling it all was. His Klipsch system wasn’t even a quarter what I had spent on my 5.2 system, yet it simply put my system to shame.
High-fidelity doesn’t just mean high-end. High-fidelity can be found if you know what you’re doing.
Asking questions and being transparent goes a long way. Curious what the suggestions may be for you.