I had a 2017 i3 for about 5 years. LOVED it. I recommend avoiding the range extender, just get the full electric, 2017 or newer with more range (and a heat pump!).
Super lightweight, rear wheel drive, actually exhilarating 0-30 (mph) and more than enough power for freeway driving.
If you can charge at work or at home and the range is sufficient, they are lovely and fun things.
