I'm conjecturing about efficiency of this van.
A company called Maxwell vehicles will convert a Promasters using parts from totaled M3/MY. They will do it for about $35k. Maxwell is getting about 420 Wh/mile. With the 72 Kwh battery those Promasters have a range of about 170 miles.
If this Cybervan gets 420Wh/mile, a 200 Kwh battery would give a rated range of 475 miles.
This is my dream vehicle. Maybe $79k in 2024? Elon I have cash.