Not sure if climate change will be so dramatic, possibly much longer and less noticeable.
In any event, we save a few thousand dollars a year with two electric vehicles (EVs) Nissan Leaf and Honda Accord PHEV which are powered by solar. 3KW system cost $8800 as 20 year prepaid lease with Sungevity. We drive 24K miles/year but I use about 120 gallons of gas. The Leaf is pure electric and we get about 100 mpg with the Honda.