Brother living with me - I’m 56 he’s 62 - adhd and schizophrenia- grief -

I have my brother living me - I’m 56 and he’s 63 - I have a partner of 24 yrs and daughter ( on the spectrum -19 yrs ) living with us - my brother lost his partner of 24 years due to cancer - year ago and our mother last December due to cancer - he has no friends or family ( has 4 children from previous wife - estranged) he has been living with us for approx 2 months - was living with my mum in her unit - stayed there after mum died but couldn’t live there as it’s in a town he was brought up in but hates - hadn’t lived there for 45 years - he got himself into all sorts of trouble - including police - calling me to fix -eventually he moved in with me ( I live close to where he used to live and have always looked after him emotionally and financially ) but his partner helped alot - now he has nothing / threaten suicide and doesn’t get along with my partner causing alot of issues - he has driven off to mums unit ( 2 nd time ) as said he can’t live here - then it costs me heaps of hurt and money when he goes off the rails - he doesn’t work and lives off Centrelink ( 2.5 years) hr has physical health issues too / I’ve tried to get him help ( he didn’t 2 nights in acute mental health which he was angry thinking I did it - I didn’t ) it’s too much and now I’m not well physically and mentally and trying to keep my job ( nurse) but so distressed - living on egg shells and emotionally exhausted - help