I don't plan to tow, but 500mile range is must for me. After 3.5+ years of experience with LR Model 3. EV with 310miles range is not a go anywhere vehicle. Especially range drop 20+% in winter(only turn on heat seat).
As Elon said, it is easy to make the truck, but keep the manufacture cost low is difficult. Assume he projected $70k in 2022 for Trimotor with 2% annual inflation rate. with unexpected inflation rate(8.7%), maybe 10-15% increase. And another 5% increase for additional motor.