There are no "hidden costs", you lease them just like any other vehicle. You can put nothing down, you can get a lease for 10k miles/yr or 12k or 15k or 20k.
WIth the subsidies in California you can be paying NET less than $100/mo for your lease, no money down, and getting the equivalent of > 100mpg (more or less depending on your cost of electricity, free for some, more expensive for others).
At 1000 miles/mo and using 100mpge at $3.25/gal the cost per mile is about 13 cents. While you amortized the purchase price of your car over 200k miles you neglected repair and maintenance costs. For a new EV those are approx $0 over the 3 year 36k mile lease. The scheduled maintenance on my EV consists of rotating the tires over the first 36k miles. Over your 200k miles you will be paying for a lot of tires, oil changes, brakes, transmissions, belts, batteries, ... Add about another 10 cents/mile for those costs.