I'll just touch on a few points.
Good sound is always naturally warm and detailed, never analytical. Analytical is coloration by omission.
I don't spend much on this hobby, I set an approximate figure that I can spend per year on average. $10k amplifier wouldn't qualify but $5k one might if I really want it.
Don't have other expensive hobbies so no compromise here.
Don't think about investment when it comes to this, but I keep the components for a long time and none are expensive by audiophile standards.
Yeah, can't listen at full volume when it's late. Not good but I can live with it.
No concern about aesthetics but if it looks good it's good !