I have seen guys that takes decades, not years to get a car on the road or restored to some degree. So I had this motto, pop on my heard one day, many years ago, as I prompted myself to work at the task every chance I had. "Get it done, it may not be perfect. but do it best I can and what make sense". Well, there is a definite line between acceptable for most and boogered up, completely, but a car belongs to the owner, but like said, it can be a disservice if you sell it top anyone!
But a guy can go to buy a car done by the owner, in his gargae, no booth, lets say body/paint. The buyer complains because the topcoat has some "dirt"in it. not perfect, then he bitches because the seller did not spend 20 hours wet sanding and buffing a $5000 car!