I make about $70K/year base pay, and I run my budget as if I make that (even though I make more most months). I fit a used $50K Model S financed over 3 years into that, and still had money to spare. I could probably still swing it if I made $50K, but I'd likely finance a bit longer in order to keep the payment a bit lower.
My work has me driving about 2000 miles/week, so a Model S just made sense. This car pays for itself in gas savings by the 2nd week of most months.
I also bought a used Cadillac for $10K back when I worked for Dominos and had no issues paying the payment on it. The flip side is I spent almost no time eating out on my own dime, I didn't go to bars/movies when my friends did, and my only real living expenses were rent and food. (Which was usually a $50 trip to Walmart once a week) I've never been interested in partying and spending money on entertainment, so I've had plenty of disposable income not being disposed of.
Now that I travel for work, I make much more money than Dominos paid and my living expenses are LOWER because I'm out of town most weeks and the company is buying food. I pay rent for an apartment I'm not actually living in, so the power bill is basically nothing, and I pay my car note. Those are my only real expenses. Cable and internet are provided by the apartment complex. So for me, a $50K car is easy. I probably could have bought new, but wasn't willing to take the huge depreciation hit due to the mileage I'll put on the car.