I remember one of my friends in college/medical school who had an M3 (back in the late 90's) remarked to me once that while he had enough money to buy a used Ferrari 348 (remember, late 90's), he couldn't justify spending money on a car that's worth more than 10% of his house. Of course, being the hypocrite he was, he bought a new M3 and had no house at the time 
So for you finance types, what's a good percentage of what car you should buy relative to the worth of your house?
Or I guess if you're a renter, what are good percentages of car monthly payments vs rent?

So for you finance types, what's a good percentage of what car you should buy relative to the worth of your house?
Or I guess if you're a renter, what are good percentages of car monthly payments vs rent?
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