Hi Hump, welcome to the forum.
Everyone here has a loved one battling addictions, or people in recovery or just reaching out for support.
Such a lot of stress for you and your mum. I agree with the rehab owner, you also need some time to breathe and switch off from the nightmare that is addiction.
Unfortunately I don’t have all the answers, but I totally sympathise with you and what you’re going through. You only have to read this thread to see how addiction has and is affecting our families. (And ourselves)
It’s totally down to your brother to take that first step for support, until then it’s difficult to stand by and not support them somehow.
I stopped giving my son cash. I bought groceries and cigs, sometimes petrol to get him to his AA or CA meetings. It’s the only thing that is working for him atm.
Please take time out for yourselves and look after your own mental health or this addiction will drag you down with it.
Take each minute, hour, day at a time , find time to be good to yourself.
The Icarus trust offers advice and support as does the adfam homepage.
Keep posting, stay strong.
Lx