Farout MN!! I think it's official. Your plate is overflowing

I totally agree with Jennifer. For me, sitting on the outside without the emotional attachment to your brother, he would need to put his money where his mouth is so to speak. I kind of read, from your post, that he is already staying with you? So maybe give him a reasonable time frame - whatever you think you could cope with if NOTHING changes to start getting his act together. If he is living in your house, as a *nearly* adult, he is also setting an example to your girls (as are you). You don't want them seeing him make a huge mess, not pick up after themself, you do all that for him but then you expect them to tidy up etc etc. He needs to get that you are not going to have double standards.

Without knowing your brother it's hard to give specific advice about how to motivate him. I would start by treating him the way I want him to treat me and by simply expecting him to pull his weight. (I am terrible at caving and just doing stuff myself because it's quicker and easier but I've come to realise this just feeds the problem).

Definitely call centrelink. They might also have some advice about apprenticeships.