i have a similar commute, i just bought a 2013 leaf for $7k cash. I plug in a regular extension cable to my wall once a week. It's easier to upkeep than a boosted board.
How do you justify commuting in a car with poor crash ratings? Leaf is a small (tiny) car from a relatively low rated manufacturer. I understand that somebody may not be worried about dying in a car accident, but the problem really is being hurt and surviving. Assuming you are an engineer, concussion, brain damage, can't work, can't support family, burden on everyone, financial ruin. The car cost is a minor issue, considering.
Leaf has a 5* safety rating in Europe. And it is not a tiny car.