I've heard a number of people say that they drive an old car so they can fly, but I've never been able to make the numbers work on that. If you were leasing a new 5 series BMW every few years, then yes, if you switch to an old car you can save enough money to fly a basic airplane, but very few of us are spending that much on a car.
If you were to buy a new midsize sedan in a middle trim level every five years, the total of depreciation, maintenance, and repairs is about $15,000 for the five years, according to Edmunds:
http://www.edmunds.com/honda/accord/2016/sedan/cost-to-own/. That's $3000 per year. If you go to an older car, you'll spend less on depreciation but more on maintenance and repairs. Maybe you could spend half of that $3000, but when I've had older cars, I never could spend that little. The difference is only $1500 per year, that won't get you a year's worth of tiedowns around here. I suppose I could drop the collision and comprehensive, but that's only $240 per year. $1740 per year isn't even a renter's budget.