Is Tesla taking too much on?

Amid rumours that Elon Musk, the main man at Tesla Motors, is planning a revolution in autonomous public transport there are concerns that the company is taking too much on. With over 400,000 [FONT=&quot]pre-orders for the Tesla Model 3 should the company be concentrating on delivery as opposed to taking on new and challenging projects?

At the moment Tesla has the finances to take on enough staff - but how long before the money runs out?