It’s not really a cross shopping car, the roadster essentially comes in 2 flavors. The modelS comes in 10 ish. 50k for a model S is probably 2015-16 P85 or S90D territory.
On a roadster it’s either a great deal or it’s a 1.5-2.0 not going to get a 3.0, unlikely have the 2.5 body style, may get hard top, may get the wall charger, probably won’t get the can Sr/Jr for that. Won’t be carbon extras. So pretty much the equivalent to a 2016 S60. That’s the comparison in value. A model S is just as expensive to repair as a roadster, but there are many more systems in a model S and the availability of parts are generally easier. But that’s assuming it’s going to break down a lot.
The S is a refined drive, it’s more of a car you share the drive with, like a Cadillac or 7 series BMW.
The roadster is personal, its bumpy, it’s unforgiving and the regen is one setting and it to is not soft. The radio sucks, it has a lot of road noise and has limited room. AND I LOVE IT!!
It’s still a great car by sports car standards, its still a head turner, you will not find more and more of them on the road. The people that own them are a enthusiasts, not the obsessive, read the manual and spout statistics and useless figures enthusiasts, but the ones that will help and try and help and not take offense, or judge if you have a 1.5 with a CAC of 60 or be envious of someone with a final 5 with a 3.0.
The model S is a nice after dinner brandy,
The roadster is the rush of lemon as you slam the shot glass,
The model 3 is also a great alternative, it may save you 10k and a lot of people like vanilla ice-cream.