The first year we had the Tesla, we 110'd it. With the mileage we put on it, we managed - but it was charging all night long. And throw in an extra "ride" for one of the kids to work, or some other trip, and that would affect things for a few days. With Superchargers for longer trips, it worked. After we upgraded the panel and put in the 240 outlet, however, things were much different. A normal daily commute takes only a an hour or two to recharge. It makes a big difference.
We don't have the Clarity charging daily, but being able to get it 'turned around' and refresh the charge in less than 2.5 hours is really nice. The time-of-use rates in the winter are not nearly as bad as they will be in the summer, so the car can essentially be recharged at any time with only a 1 or 2¢/kWh difference. Once the summer hits, we'll have to exclude the 4PM-9PM window. Then, the difference will be 27¢/kWh!
There are a few free level 2 chargers within a mile, but as can be imagined they're not always available. So the question of whether or not one needs a 240v outlet is going to be determined by an owner's need as well as their means. As mentioned, if nothing but an EVSE needs to be installed, that's still $300-$500. But if one must install a new circuit and pull wire, it'll double the price. Add in the possibility of needing a new panel, and you're beginning to talk some real money.
But as mentioned on another thread, some of this work may be eligible for a tax credit. (
http://www.insideevsforum.com/commu...s/2017-tax-credit-for-charging-equipment.657/ )