Am I crazy for considering working longer to buy a Model S or 3? It would take me about six months at my current savings rate for the S and half that for the 3, insurance will be more money forever, still tempting...
Short answer: You're not crazy for considering anything in particular, if it's in line with your priorities.
Long answer: I haven't really mentioned it here*, but I recently bought a 2012 P85. I've watched the company since the beginning, debated long and hard with myself where that fit into my priority stack, and finally made up my mind early this year. The crux of the matter for me was that I value a few other things at least as much as FIRE, and the main reason I want FI is to reallocate the time and energy currently going to my FT job into advocating for renewable energy and electric transportation. So, it's part and parcel of the same effort, at least for me... it might cost me a few months on the "magic number" date, but it's all tied up in the same set of goals, and it's here now. Just like my solar panels, home efficiency upgrades, etc.
I actually hate the fact that it's a luxury car, because I'm a dirty mofo and the niceties are wasted on me, but it's quite effective for what I got it for... showing my friends, neighbors, and CWs that a well-designed EV can kick the shit out of the ICE equivalent at everything cars do. Hardly a week goes by that I don't take someone for a ride, attend an event, do Q&A, etc, and the results are invariably positive. So, for me, this is just allocating resources according to what matters to me.
Total cost of ownership is high by Mustachian standards, but it does pay back in various ways... regional road trips on Superchargers ($0) vs. plane tickets for 2 plus dog boarding ($$$), and local driving (home-charged) costs half of even the Prius' average ($.02-.03/mi vs ~$.05).
Post-FIRE, the travel cost savings will only increase, as we take advantage of our free time to get out more.
They also tend to be cheaper to insure than most people expect, because they're so incredibly safe, and maintenance is... what maintenance? The entire thing has like 20 moving parts, and even the disc brakes get so little wear that they're more likely to rust than wear out. Battery warranty, 8 years, unlimited miles, and so on.
Not the choice for everyone here, obviously. Not the choice for most. But my choice, for well-considered reasons.
As long as your choice is compatible with your own goals, nobody can fault it.
*I'm not ashamed of it, nor do I regret it in any sense, but the general sentiment being what it is, I don't want to get wrapped around the axle with dogmatic feedback.