You're not obligated to answer to me, but you should have a really compelling reason to lease a 2018 (especially the current one). Later this year, the new i3 will be released with an even large capacity battery. If you're going to lease a new car, you may as well wait if you can really help it. Prices may be similar as BMW is starting to really stretch it with their MSRP's of i3's.
These monthly lease prices being quoted here are scary. You really sure you want to spend more per month on a lease of a new vehicle than the monthly payment on a finance of a used i3? Each to his own. I'm sure you have your reasons, but just want to make sure you're not overlooking the once in a lifetime opportunity to take advantage of 2015 inventories of lease returns that are selling for dirty cheap. Some as low as $15k.
I recently saw a 2014 i3 Rex with 46k miles and all the packages for $16k. That's not the one you want since you want a BEV, but it gives you an idea of the prices these have dropped to. With a BEV, you're clearly not expecting to put on a lot of miles. You understand the range limitations and your lifestyle fits it well enough to want an i3. if that's the case, there's plenty of 2015 BEV's for amazing deals as lot of people are looking at REX's instead. Probably even higher inventory of BEV models. I don't recommend a 2014. DC charging not standard, had a bunch of bugs, warranty is too limited since it's older and miles tend to be higher. 2015 is your sweet spot.
Again, not trying to talk you into it but just know what you're NOT doing by leasing a 2018. Believe me though, I'd love to be driving around in a red 2018 i3s. Boy that thing is beautiful and fast! But at $60k decked out, I'll have to pass. There's too many sub $20k ones to buy that are on the lot screaming out my name. You know the deals are good when the CPO prices are competitive with the private sales.