I find this surprising. I specced out an L2 charger and it did cost me $2K for the install + charger a few years ago (in an expensive market). The install required a new 100A line pulled to my garage as I had no existing washer/dryer there.
What else would you need to support L2 than an extra breaker entry for a 100A?
We'd need to upgrade our panel, as it's already maxed out. On top of that, we'd also have to pay the power company to upgrade their distribution box and the wiring that's buried in a trench that runs under the garage. And, joy of medium density, we'd need about 10 other households to get in on the action and the price I quoted is per unit.
Basically, the problem that we're experiencing is that everybody in the neighborhood has already maxed out their service. Infrastructure upgrades are painful.
What else would you need to support L2 than an extra breaker entry for a 100A?