TN is in the stone ages. No rebates, and it costs *more* to register an EV than an ICE here. Also no EV exemption for HOV lanes (doesn't matter as HOV lanes are not enforced at all). In AZ there were no state rebates, but a 5 year registration was $50 and you got single driver HOV access as well.
And FWIW I paid just under $6k to trade up from my AWD to a slightly newer, lower mileage used P3D.
@phantasms if you're willing to pony up another $4k you may want to keep your eyes out for similar opportunities.