I find that the 30 miles my PHEV gives me is not enough for daily needs several times a week. Though I seem to be saving hundreds of dollars every month in gas while I haven't noticed a power bill increase (I've only had it for a few weeks so I can't fully gauge the impact, but so far it seems to line up with your report). At the point I can safely tell most people that they should just refuse to look at any new vehicle that isn't PHEV or full EV. Used car buyers should be willing to pay a lot more of the above - it will pay off in the long term.
Note that the big battery in a BEV is a great averaging mechanism. As long as your average drive is less than the amount you get from an overnight charge, you're likely fine. If you're adding 40 miles of range a night to a 300 mile battery, you have to have 4 consecutive days of 100 mile usage before you have to hit an external charger. Mix a few days of 20 mile usage between those 100 mile days and external charger usage is exceedingly rare.
