I'm driving a Nissan leaf, and it's costing me about $180 to drive 10,000 miles (4.2ish mi/kwh average over the past year), compared to about that same amount for under 1,000 miles on my Tacoma. I charge 99% at home using a 120v charger and I back calculated using my average mi/kwh and electricity cost. There's basically no maintenance, so the only extra cost of ownership is basically tires and brakes. My best guess at the battery degradation so far is about 2.5% per year, but the previous owner went extra lengths to keep the battery in good shape, as do I.

So far it looks like every 4-5 years I can replace the battery at the highest estimate and break even compared to my Tacoma. This is the original battery, still at about 80% capacity from 2016 and almost 50,000 miles.