Hitting a boulder

I am not going to be a partner in the private gym that my friend had or lose weight, cause he wants money from me. At first it wasn't even any talk of money but now he says in order to show that i am really serious i have to put up some money like 10,000 dollars. So i told him straight out "where u want me to get this kind of money?  My behind! And he is like come on now; training you to loose weight it is like 2,600 for only 20 classes. So i told him i can loose weight on my own. He said no u need to exercise or u loose mussles so i told him i can't even give him 2 dollars and he said "then we have a problem".
Da...., we sure have a problem. What should I do people?