Leasing an i3 appears to be a terrible deal. I actually tried to do this thing, and I called the dealer and told them to warm up their rubber stamps because I was coming to close the deal. Here's what happened when I showed up:
1: Oh, the deal that we were advertising that I specifically told you over the phone was available actually isn't because [mumble mumble types of bullshit about how that car is a demo etc etc bullshit] but this one comes out to only $10/mo more.
2: Here's the insurance you should buy for the wheels, for $2k, because some asshole at BMW thought that 19" wheels looked really cool, and the metal parts of the really cool 19" wheel stick WAY OUT past the end of the really expensive 19" tire, and you're guaranteed to ruin the wheel the first time you try to parallel park the car, and each of these wheels costs $1500.
3: And furthermore we really suggest you purchase this other insurance policy which covers among other things replacement of the headlamp windows, in case they turn yellow over time. Because, you know, there's no assurance that just because you leased a car with a sticker price of $58k doesn't mean that they didn't make the headlights out of the cheapest plastic they could get their hands on.
4: And more or less a constant parade of nickel-and-dime stuff until finally I got up and walked out.
I really fail to see how anyone can make one of these cars pencil out. The operating costs are not all that low. You really need to bring a very high intangible value to driving an electric car before it appears rational.