As has been posted you cannot protect their Money from the authorities in the event they need care in the way you describe. To be blunt, the last thing you want is a paper trail that the authorities can trace and use in a dispute. If I had more than the amounts I have already shown you can protect If it were me in the OP’s dad’s position I’d develop a “gambling” habit and a taste for very expensive wines and fine dining. This would be documented by irregular CASH withdrawals from my accounts. What happens to the cash is of course untraceable. just saying... Incidentally I can guarantee your other family will challenge anything you do if they aren’t included. Seen it happen too many times.