Have you tried getting someone else to talk some sense into him? Honestly, the man's a father and he's still acting like he's a child with no responsibilities whatsoever.
I can understand how hard it must be for you to watch your $$$ because I'm on a one-person income as well (hubs just earning 3.5K) and we always talk about financial planning, saving money and etc because with a child, anything can happen, especially for us non-citizens/PR holders, which may result in us dipping into our "rainy" day piggy bank.
As for you getting some time for yourself, are your parents around? Can they help look after your baby while you get some time off?