Oh dear.
Well done you. You have a daughter who loves you so much, she will wrap her life around you.
Well done you. You have a son who you raised with such good values, he's there for his in-laws.
So what did you expect, other than raising two good children?
Your daughter does it from the best of intentions and love. So feel free to gift her, husband and children for stuff. Spend and enjoy your money while you can.
But do you really want to die and leave your son in grief and feeling unloved because he's looking after other elderly relatives?
Maybe he feels unimportant because Sis has everything wrapped up.
Everyone who is old is a burden. There are not enough younger financially stable people to go around. But both your children are doing their bit.
So I would spread the joy. Assuming your daughter and husband can financially accommodate you - give them something specific and extra each year - like a 2-week holiday - where they can be alone and stress-free - and someone they trust is at home.
But seriously, care home fees are £2K per week. How long will the sale of your home fund that?
Your daughter sounds amazing. Your son sounds pretty decent. If you have a final amount to spend - I'd work out what you want to achieve with it. Because one way or another, it will be all spent probably before you die.
And you're incredibly lucky. Both your children want to support and feel responsible for elderly parents. You'll always have a roof over your head and people who care about you.