This brother has to GO!
Your Mother is 82 this is NO way for her to be living out her twilight years.
He is a lazy , selfish loafer & has no regard whatsoever for the feelings of your dear Mum.
You need to get together as a family , remove your Mother from the situation and let him know he can no longer freeload.
It will be such a relief to your Mum if someone else does it for her.
Don't live to regret this decision cos your Mum isn't getting any younger.
Kick him to the Kerb and let him take care of himself. He needs to get it together & there is NO way he will do this at her house.
He is in his 50s living with Mum, yet has a son himself.
Do her a favour today, sooner rather than later so she can have her life back.
Good luck , I think you are so thoughtful and caring and want the best for your Mum.
️Xxx