1. Electromagnets are well understood and can replace the permanent magnets in motors. Iron and phosphorus are common; lithium iron phosphate chemistries can replace the nickel-cobalt chemistries currently used, more cheaply and more robustly.
2. PV panels now have a capital cost of about $1 per watt and imminent technologies will drive that close to single-digit cents per watt, with corresponding declines in labor requirements and deployment timetables of days rather than weeks. Stationary storage costs are also plummeting.
So we should experience deflation in EV prices and running costs rather than inflation. Roads, on the other hand...
3. The big challenge is deploying chargers in sufficient numbers. If it takes 90 seconds to charge a car with gasoline and an hour to charge an EV, we need 40 times as many chargers as there are gas pumps, modulo any charging done at home and population growth/changes in vehicle usage.
Meeting this last challenge would seem to require sweeping aside NIMBY objections to on-street charging. The implications of neutering NIMBY veto power could be far-reaching.