How much money do you put into a car?

I bought my car thinking I would just have to do a couple little things like BBP brake swap up front to make it complete. Motor and everything was done, good rear, built tranny, interior was 90% complete, all the expensive stuff I did not want to have to pay to have done. HA! I was kidding myself! Whole new 4 link rear, whole new fuel system, motor getting rebuilt now, interior is completely stripped out except the dash, going to have to rewire the whole thing, going to change to all aftermarket gauges, all new exhaust, all new front end, where does it end? I'd like to say I haven't lost sleep over the thought of what I've ended up putting into this thing. But now I've come to accept the fact that if I want the car to MY standards, it's going to cost some money to get it there. I'm already in it this far and need to see it through. And in the end, I will hopefully be glad that I did it, regardless of all the money I throw at it that I won't get back. HOPEFULLY!