I had a 2004 Cadillac CTS-V for a couple of years. $52k new. I paid $12k in 2011 and sold it for $13k in 2014.
I might get facepunched all day for a 400hp V8 luxury sedan, but damn was it fun. And worth it. :D
That's the thing about a lot of the slightly older luxury marques, you can get a lot of car for Civic prices if that's your thing. $80,000 Porsche SUV for 20k? Sure, why not? (as long as your commute isn't long) You do have to enjoy working on cars a bit if you go this route though. If you're handy with a wrench (and an OBD diagnostic tool) many of these cars can be worked on in your own garage more than most people think they can. Reliability concerns are real but some models are not as unreliable as their counterparts. The unreliable models in the lineup really drive down prices on all of them (i.e. Porsche non-turbo 996, BMWs sold under the 15k mile(!) oil change interval, etc). Not to mention the people that must have the newest model and immediately trade in their 3 year old M3 for the latest.
If you take the time to research what the reliable models are and what it takes to fix the most common issues you can enjoy "expensive" luxury cars for a fraction of the cost. Or, you can look for the "cheap" version of the luxury car, VW Toureg vs. the Porsche Cayenne.
That said, a Civic, Fit, bicycle, bus/train pass, etc is still going to be cheaper and more reliable, I'm certainly not going to argue that! You really do have to be a car enthusiast to game the luxury/sports car market effectively, if you don't care about cars at all then there's no point. Mustachian? Probably not. OTOH, as JLEE posted above, he drove a 400hp RWD sport sedan for 3 years and paid only gas, insurance, and maintenance. All of which you're going to be paying anyway if you own a car. Besides, everyone needs a hobby, right?!