You also have to take into account how much your time is worth;
Say you make $250,000 a year, I'll use a 50 hour 50 week work year. Thats probably low, but whatever. $250,000/2,500=$100 an hour. So you would be better off working and paying someone to fix your car. You have to figure out what your time is worth, and what your free time is worth. If you are like a lot of people and work 60-80 hours 5-6 days a week, on your day off you don't want to be working on an old car. More so when you can spend $400 or so a month to lease something decent like a 325I.
Everyone is different, not everyone wants their car to be a hobby.
Personaly I'd rather play golf, fish, sail, skeet shoot, ski, or hang out with friends and family during my time off, vs busting my knuckles on some old part. Been their done that. Not to mention cars are the worst place in the world to put money. You know what they say, if it floats, fly's, drives or ****s rent it.
