It could take a few years, but it could also be done a lot faster than you'd expect, because federal and state governments already own and control a lot of land

It could take a few years, but it could also be done a lot faster than you'd expect, because federal and state governments already own and control a lot of land next to all major highways. Think existing rest areas. Legacy vehicle manufacturers still have plenty of time to catch up, because Tesla forecasts it will take ~5 years to grow its global EV manufacturing capacity to be able to fulfill around 10% of global annual vehicle demand, which is around 100 million consumer+commercial vehicles/year.