I can give you some anecdotal evidence:
My son drives a Chevy Volt (a plug in hybrid.) His house does have solar power too. His annual electric bill (year before buying and year after buying his Volt) went up about $150.00, but his annual gasoline bill went down about $4000.00.
Ask yourself, with the advent of computer assistance, and cutting of red tape, how long would it take Bechtel Construction to build a standard design plant on a previously approved site? (My guess about 3 years.)
He should save that gasoline money to pay $30,000 for new batteries in a few years.