At Tesla's profit margin and economies of scale, it might be the first decent sub-20k USD EV
Or you can get a new Toyota Corolla for $21k MSRP, which is close enough.
2. To effectively be a $20k car EVs have an advantage because of their tax subsidies. {Base Price} - {Tax Credit} < $20,000 is plausible. It's impossible to say who will qualify or how big of a tax credit US customers will have by the time this would launch.
Mitsubishi Mirage, $16,245
Kia Rio, $16,750
Hyundai Venue, $19,650
Kia Forte, $19,690
Subaru Impreza, $19,795
Kia Soul, $19,890