I commend you on wanting to do the 'right' thing even though you are hurting from the end of your marriage. I would discuss with your lawyer what would be fair: not too low that she won't be able to live nor too high (deterrent to her being independent but also taking away from your financial security).

I disagree that because she was the one who gave up on trying, she ought to be 'punished' and not get anything at all. This is really harsh. She has tried and clearly, for her, it is too painful to go on. That is no reason to leave her destitute/struggling.

And seeing you both agreed on your roles i.e. you as the breadwinner and her taking care of the things, I think it is doing the right thing to help her out. It won't be easy for her to earn a living, seeing she was out of the job market for so long, not to mention obsolete and/or lack of qualifications.

Because the partnership dissolved doesn't abdicate you from doing the 'moral' (if not necessarily legal) thing. Again, I commend you for trying to be fair. This is rare nowadays.