Hi Casslan, welcome to the forum. That's a sad story you're telling there. Presumably, from what you say, you are both New Zealand citizens who want to return home. I guess, under normal circumstances, you could just walk back in, but it seems your financial situation won't allow it. From the sound of it, your husband wouldn't even be able to withstand the long journey. It's difficult to know what to suggest to you that would be of any help.
Have you got anyone who could look after your husband while you took a trip back to NZ? And have you any family there who could help buy you a ticket? It wouldn't be the same as going back to live, I know, but maybe a break would do you good. I don't know how long you've been away from NZ, but perhaps a trip back would be all you need, as things may not be quite the same as you remember them.
Short of writing a letter to Helen Clark, I can't think of any other way to overcome your problems. I hope something will turn up for you and your luck will change for the better.