It's a legit offering. The company intends to build a big factory and make stuff. Real capital assets will be bought with that money. It's not to sell stuff at a loss to gain market share in hopes of raising prices later. (Looking at you, Uber.)
Tesla just hired Audi's head of manufacturing, Peter Hochholdinger. About a week ago, the previous two top people in manufacturing quit, right after Musk announced he wanted the production line running two years sooner. Maybe Hochholdinger can do it.
[1] https://www.sec.gov/Archives/edgar/data/1318605/000119312516...