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.

totally relative here, no rule of thumb, especially if you buy stuff with good resale value...if it makes you happy and you can afford it...same with houses, cars, watches, boats, everything we don't actually need...