My father in law has owned and run with his wife the same rural, independant garage and used car dealers for FORTY years! and worked there for over 50 years! (he gives me his previous glass's guide every month
)
They're retiring now and renting out the garage, but he's still doing car trading on the side as that's where the easy money is - forget servicing and repairs and all that grubby hard work.
Well, it's easy when you've been doing it for over 40 years!!