Advice needed please please please

This is a bit of a crisis post for me to write so please bare with me.

My cousin (27) has a diagnosis of schizophrenia, agoraphobia, and bipolar and has been living homeless on the streets of Brisbane for the last 7 years. He regularly throws his phone away because according to him it’s tapped. He has absolutely no one in this world except for his Mum and me. However his Mum has a police issued DVO against him because of his erratic behaviour and how terrified he can make her feel. He done a 3 month jail sentence (November 2021) for breaching the DVO, train fair evasion, petty theft, and hitting a taxi driver in one of his delusions. I tried contacting him in jail, but he refused any contact and the first contact he had with me was maybe 3 months ago.

His mum and I both give him money - $15 a day from his mum so he can eat and I’ll usually transfer around $50 all up a month. However he does get Newstart somehow and has to report. He is constantly losing his id and bank cards and will say people steal from him when he is asleep.

I only get to see him on his terms which I pick him up from the train station, we eat hungry jacks and I listen to him for 3 hours rant and rave in a field and then I drop him back off to the train station with no where to go. It’s heartbreaking.

Just A few things I heard yesterday from him - so apparently he is living at a golf club that leave their shed door open for him. However, the cameras on the train follow him and undercover translink workers who have a deal with the police call him a dog. The songs he listens to make sex noises so he has to change their frequency. Trainslink have told all the shop owners not to let him in because everyone calls him a dog. All the ugly people who aren’t sexually active are the people out to get him, and all the good looking people are the traps. He got drugged and abused in November 2019. All of Brisbane is blown up, everywhere he goes is blown up and everyone tries to set him on fire. His girlfriend he had at 14yr said good boy to him once and that’s why people call him a dog. The church is the mafia that’s full of sexually inactive members who follow him like traps. He says that he wants to end his life because people want him dead and that’s why he harmed himself to make it look that way. But now everyone looks at him like he is a junkie and now he wants to end his life but can’t because they want him dead.

And that was only a minimal amount of what he said that I can think of.

I’m at a loss and I don’t know what to do. His mum is emotionally and financially drained and her heart bleeds so bad for him. He has been in an out of mental health and has completely slipped beneath the radar by lying. He is on parole until November and has to see parole monthly. I don’t understand how parole haven’t picked this up, like he has no address and is clearly delusional. He can keep routine in his head, but 98% of his functioning is through his delusions. It’s just the most heartbreaking thing to have witness for the last 10 years and he is just so miserable. He doesn’t take drugs, but he drinks red wine. He is completely unmedicated and there is no way we could get him to a doctor. I’m the only person he trusts atm, but I could be his worst enemy the next day.

Does anyone have any experience with this? I don’t know where to start, what options do we have left? Thank you 🙏