Regarding the company's solvency, the assets of multiple gigafactories, globe spanning charging networks, and other manufacturing facilities are not going to dry up and blow away. The company is acting very aggressively to achieve their vision, running apparently a little too close to the edge for the comfort of many analysts, who's function it is to
speculate.
The company has a track record of a decade, and what is not speculation is within that time Tesla has disrupted the auto industry world-wide. Every major manufacturer has rushed to emulate them. Tesla has succeeded in penetrating the largest automobile market on Earth, China. The Chairman awarded him with honorary citizenship.
Construction of that gigafactory is going to set a world record for how fast a major manufacturing facility is constructed.
I am personally amazed at what Musk has accomplished. He is a catalyst to every industry he touches. Banking, solar, batteries, automotive, and aerospace. Any
one of those accomplishments would be the crowning achievement of an entire career. He has done them all - and I'm guessing he isn't finished.
I understand your apprehension, I had it too - right up to the moment I drove this car. We placed our deposit over two years ago with the intent of buying the $35,000 M3, but ended up with a loaded $60,000 car in the garage... and no regrets. Nothing but rainbows and unicorns.
This is just my opinion, but for a professional objective opinion I recommend you search YouTube for
Sandy Muro and his take on the model 3. For a deeper insight into Elon Musk I recommend you read his biography.