Reading this feels like dejavu beside I'm responsible for 3 little kids (1, 2.5, 4). Having three of them instead of one is a bit more demanding, but not that different. My day looks very similar.
I'm bootstrapping a game (http://www.car-battle.com), it made $0 so far which doesn't make it easier, but working in such environment you have to be super-persistent to make it work. This is what I do.