HOW MUCH IS TOO MUCH TO SPEND ON A SYSTEM? IF YOU GET THE SOUND DOES IT MATTER?

2% of your net worth is a good limit.

It's all relative I guess, but as long as all of one's necessities in life are not being neglected due to a financial strain that supporting your system is imposing, I guess one is okay. 

And I can relate to what you typed about how at one time you would have never thought you would have spent so much on a system. 

It's up to you and the value you place on your audio relative to everything else in your life. If you are not in a state of regret and are fulfilled with your music, your journey, and the learnings you gained along the way, you are in a good spot.