I suppose it depends on how much it means to you. The thought of having a car ive built from scratch, knowing that before i started it i couldnt weld, hadnt a great deal of experience working on cars. I would never let the car go, i imagine it becoming a family heirloom
But if i could do it all, weld, build engines etc then i suppose it would just be another car that would come and go.
Also other factors like time, nagging woman

, Money probably play their part in not finishing the build