I would leave definitely if it was part of an overall campaign of meanness/nastiness/abuse.

I would consider staying if it was totally out of character and there were extenuating circumstances (eg a new medication which caused him to flip out/have a bad reaction), and he was remorseful, shocked and prepared to address the underlying cause.

I've got a feeling for you it's the former rather than the latter?

It's a decision only you can make, and it's not an easy one. If you do want to leave, don't let no finances get in the way. There are support organisations out there and there is also social security.

Here's a website where you can find out what support is available in NSW: Victim Resources — Womens Refuge (hope its ok mods). Also you can call 1800 65 64 63 to contact a DV support network.