I intend to leave my car to someone else after I pass, so I won't be doing it there. I don't live alone either, obviously.
It's quite likely that I will pick either a hotel room or some place in nature - depending on whether my method is SN or drowning/hypothermia. SN is the "safe" option, assuming it can be acquired by my self-imposed deadline.
I honestly like the idea of giving myself back to nature, dying in the peace of the wilderness. To me, it feels altogether empty and isolating to be confined to a rented room.
I'd prefer one last look at the skies above before taking the cold plunge to wash away all suffering and regret. I hope to experience the beauty of this world in its fullness during my final hour.