Question: Were the Founding Fathers Capitalists?
Answer: Yes, on the whole with some areas of exception. In the economic area of your life, all of them were on board with the idea that you should have freedom to choose whatever career you want to go into, how you're going to support yourself.
Freedom of movement across the entire country, or even to leave the country. Freedom to do business with anyone you want, whom you're going to trade with. A robust conception of property rights as well.
Now there were some exceptions. The most important of those exceptions was slavery; that barbaric anti-capitalist institution, especially in the South where it was allowed to continue. It was tolerated, but even so, almost all of the Founding Fathers recognized this compromise, this anti-capitalist compromise for what it was; a stain on the Founding, and most were resolved to do something about that.