@whobubu, we can’t say how much is enough - this is something you and your DH need to sit down and work out. Interest rates are very poor at the moment so unless you can live completely on your husband’s salary, you will be eating into capital.
Also, as PPs have said, what are your plans if he is made redundant or becomes ill? Is he 15 years older than you and going to get his pension any day now or is this going to be a risk for the foreseeable future?
If you are early 50s you have 15 years before you start getting £9,500 a year state pension. You haven’t said what your DH’s pension is like - if you do end up spending all your savings, will it plus the state pension, plus your “tiny” pension be enough to live on?
It may be you are fine giving up work and that all of these calculations work out in your favour but you really need to sit down and make them all.
If you have £100,000 in savings and no other income because something happens to your husband’s salary, depending on the bills you will be broke in 5 years (at £20,000 a year).
You haven’t said if you are planning on depending on your children’s contributions. If you are, what are you going to do when they move out?
I think your daughter is very sensible to raise her concerns - she wants to avoid any risk of feeling she has to keep living at home because she’s afraid her parents can’t cope without her keep. It is much more sensible to raise it now rather than a few years down the line. If you can reassure her that £250 a month only covers the additional expenses incurred by her living at home and her moving out won’t affect your finances in the slightest, you should do so.
I think the matters she has raised are very sensible and I’m surprised at all the people who have made snide comments about her. Not wanting your parents to live in penury doesn’t strike me as self serving or uncaring.
You have given no indication she isn’t happy to pay up - she just doesn’t want you to make financial decisions for the next 15 years based on her living at home because she won’t be.