Here's the real problem, it NEVER ends.
If you actually drive the snot out of them, they use up and break stuff.
Then there is chasing every last bit of performance. How about the tools needed to work on these babies? I was a GM tech and I've had to buy a slough of tools. Oh yeah, maintenence. An oil change costs me about $125 2-3 times a year. Brakes need blead out after most events with expensive fluid.
2nd set of wheels(3 piece I may add)
2nd engine(YOWSER that chapped my aise)
3rd set of front rotors(2nd set of wheels dictated and current are wore out)
2nd set of complete rear brakes(Brake Knockback)
Pile of brake pads(Performance Based)
2nd set of axles(Brake Knockback)
2nd set of springs all four corners(Performance)
2nd master cylinder(Knockback and wore out)
2nd clutch(See number 2)
Going on 3rd radiator
4th set of tires
2nd front sway bar
3rd change in oil plumbing
2nd set of tail lights
3rd or 4th front spoiler
2nd drive belt
2 rear sway bars(Neither are on the car)
Certainly not all by neccessity.
I sold a 2001 Corvette convertible for parts. It had about 16,000 miles on it and sold for 30k in 2007.
If I could go back to 2006 when I got this hair brained idea, here would be my advice to meeeself. Find the cleanest car in the right color with a good paint job and mod it WITHOUT doing a full resto. Building anything from scratch is EXPENSIVE. The good news, it's a better investment than many other things I've sunk my money into over the last 5 years. I've enjoyed the hell, and continue to enjoy the hell out of it. If I ever sell, I'll be OK with the loss.