Most people can charge during the day. Employers often provide free EV charging, but even if they don't, power will be mostly free during daylight hours moving forward (due to solar). Also, employers that require people to commute almost universally provide parking lots that could be retrofitted with chargers.
In the worst case (only charge at night, run battery to 0% every day at sunset, leave at sunrise, power company bans charging at night), someone could install a stationary battery with about 120% the EV's charge. That's overly pessimistic and still only a factor of 2.2 on the price of the battery.
Over a 5-10 year period, EVs currently pay for themselves in saved money on gasoline.
Crossing the Mojave seems easy enough to me. There would need to be charging stations evey ~100 miles. Finding space for the necessary solar capacity would not be an issue. The stations could charge 2-4x "city' rates and would be very profitable.
You can already cross the Mojave in even a low range tesla, for what it is worth. (Victorville -> Las Vegas; they say you need to charge for 20 minutes in Baker, CA)