How far is to far gone?

I have done extensive rust repair on my 1971 Challenger. I had to replace the floors, quarters, trunk floor, trunk extensions, dutchman panel, rain gutters, and front inner fender wells. I have a ton of money into it and in todays market, the car is not worth what I have into it, but it is a car that I have wanted since I was 16 (40 now). It has taken me 7 years to get it to the point it is now, but in the end I will have a cool car set up how I want and I will give it to my son when he is old enough to appreciate it. So think about what the car means to you, because sometimes you can't put a price on something like this.