[germandiago]

That would be true if you get plans, materials and labor for free. What you do is to pay for it under mutual agreement. So you do not contribute the last bit. You contribute in all the chain, because each of those people got what they wanted so that you can build what you wanted.

Your argumentation is incorrect.

By the way, what is equity? If you come spoil me because I make money, what kind of equity is that if you do it to me just because I make money? Equity would be to not spoil anyone. Trying to punish them on the basis that they make money (or that they make little, I do not care) is not equity. It is something else.