You get the idea. If you want to do an apples to apples comparison, then choose some other two seat sports car that can go 0-60 in under 4 seconds.
For example a 2008 Porsche 911 Turbo sells for an MSRP of $136,500; has a 0-60 time in about 4 seconds and goes 325 EPA miles on a tankful. The Porsche has a greater range and better refueling options; the Tesla is less costly to buy and to operate ... and uses no foreign oil!
Neither car is comparable to a Mercury Mariner; they're completely different!
Certainly not for the initial group of buyers. They're buying status and have the means to pay for it. That is the money the company will use to develop more affordable cars down the road.