Given that the government doesn't really make much and he creates what they want, yes, he gets tax payer money. I'm not sure why this is a bad thing? His rockets and cars are bought by private sector too.
What failed business ventures paid by the American tax payer are you talking about?
Why is giving taxpayer money to fantasy projects a bad thing, are you serious?
Hyperloop is probably the most prominent example.
Elon Musk is speaking out against government subsidies. Here's a list of the billions of dollars his businesses have received.
Musk's companies benefited from subsidies as recently as April, when SpaceX won a $2.89 billion contract from NASA. Tesla got subsidies for years.
www.businessinsider.com
In any case he's certainly not self made, he's propped up by the government which was my point.