Surely your brother has his other half of the “inheritance” and if he put any of his first half towards buying a house with his wife or into a business then it should have been ringfenced in the divorce or the company failure.
If he started one business he can start another. My family have been devastated by lockdowns. We have all had to start again.
If a woman in her 60s with an O level in Maths who hasn’t had a f/t job since 1987,
2 adult children with SENs, arthritis, ADHD and depression and with a terminally ill Dh who put us in this position can start again and make things work then I am damn sure your db can.
Was the amount set in stone 24 years ago or has it been adjusted for inflation because even £20,000 24 years ago is a lot more now and if it wasn’t going to be adjusted for inflation then why didn’t you take it like your sister and brother did.
Your db is in a flat on his own for the most part of the week. He needs to see it as a challenge to claw his way back and having the freedom to work without other people in the way
I understand that he needs a job but I also understand his feelings about going back into f/t employment and having someone tell you what to do.
I did a range of freelance agency work during the lockdowns and after doing all sorts of stuff. I was still self employed and could pick and choose if I worked. Whilst establishing another business.
Going back to work doesn’t have to be 40 hours per week every week with a boss for the rest of your life.
Don’t be the martyr in this situation and say tell your parents no.
Point out that you want what you were promised because of your failing health and turn the tables and ask if your db might give you some if his remaining “inheritance” as you need it more than he does and he has already benefitted from a good chunk of it.
Just as a thought.
Are you sure that your parents actually have the money. It seems strange that they told you all to wait till 40 as given their ages there could be a possibility of them needing to go into care or even dying and if they have given away everything then those who have had the money in the previous few years might have to pay it back for care home fees or in inheritance tax
Did your parents get financial advice about this as it seems to have so many pitfalls if the whole thing isn’t drawn up correctly.
Who inherits the rest of their stuff if their children aren’t getting anything on their death.
Your sister who took the lot is the only one who is immune to what might happen.