Hypothetical situation. You just came into some money you don't quite need (cashed out an investment, won an awesome scratch ticket, old lady gave you a bag of cash for carrying her groceries, whatever...); lets say $50,000 (that old lady was sure generous for your grocery carrying abilities...).
So since you don't need this money to pay off debts or live on, being the gear head you are, you decide it shall go to the car fund.
The question is, do you spend it all on one, really nice, well sorted car?
Or, do you spend it on say 5 $10,000 cars, and have a mini collection of somewhat-maybe-possibly collector cars?
For this exercise lets assume space is not an issue one way or the other.