Wait until after the hearing when all your financials are laid out in black and white. My ex was always pleading poverty and didn't send any child support until I took him to court. They enter both of your incomes into a formula and base it on that. He was prepared to give me thirty dollars a month, and acted like it was a million. He ended up paying $150 a month.
Despite being "too broke" to pay child support (and then whining and b!t@h!ng when he got ordered to) he bought a new car and took a monthlong cross country vacation last fall.
You might feel less sympathy when you realize how much money he is actually frittering away on booze and selfish crap.
If he doesn't go to the hearing they might enter a default judgement against him.