I bet the guys on Fast and Loud, for example, could design and build a swap out machine for 100K or so.
Then some entrepreneur gas station around Victorville along the I-15 between Vegas and LA would install one and advertise. The publicity would be worth it. Plus he could install solar for recharge.
Let the market work it out.
Amen...The government should get out of picking winners through subsidies for all types of alternative energy.