As someone who'd love an electric car, I'm already out of the running with a family of four children. I don't have the cash for a "second" car - it make better financial sense for me to spend that cash on gasoline.
You can get nice off-lease EVs for dirt cheap, low miles, and excellent battery conditions. I bought a 2013 Nissan Leaf for around 9K that was essentially in mint condition. It's not a Tesla, but for my 3 mile commute each way, it does the trick nicely (and the charger at work is a nice bonus in minimizing my overall costs).
The problem though is size -- especially with 4 kids in the picture. My wife and I have the short range cheap commuting car (the Leaf) and a long range ICE cross-over. Works great so far and has been easy on the wallet.
I wasn't sure about the whole EV thing, but now having one I love it (and the way they drive/handle -- its very much a fun car to drive)