But will it justify its stock price?
No amount of metrics can or will justify a company like Tesla's current stock price. At this juncture, you are mostly getting into a wild ride. I state this for the following reasons:
1. Tesla is not a car company. Not anymore. It's an energy company. So all comparisons to existing car companies are void. You need to make new comparisons with energy companies. But then, there is no energy company like Tesla. Exxon is probably a good comparison but heck by that measure, Tesla is super cheap.
2. Tesla is run by a Maverick CEO. Admittedly, none of the car or energy company CEOs fit that bill. Tillerson probably came close but he is not with Exxon anymore. What Musk can or will do, is hard to predict. Simply put, there isn't enough data to support such predictions. Tesla's past has been very volatile. So basically it's very hard to model Musk's future plans. He has started digging tunnels now.
One can just go wild imagining the possibilities for Tesla.
They could become a utility company. They could be the storage backbone of many utility companies.
The supercharger network in itself can be highly valuable. Imagine if all cars were to go electric and Musk strikes a deal with all the automakers to make their cars compatible with the supercharger network.
We are just getting started with Tesla and it's super difficult to put a future value on them. Even a 12 month projection is pretty hard.
So analysts are doing the best they can. Draw projections based on tangible raw numbers. Gigafactory growth and Model 3 growth. This growth will not be linear by any measure. So expect dips in the stock price accordingly.