I'm not normally a softy but after 30 years I hate change.
It's strange but you look a lot older than that Martin.
My folks cursed my brother and I when we lived at home. Then we both left at the same time and they found it a real shock going from a house with 2 active lads to just 2 quiet old folks. Dad used to go out to the garage and said it seemed derelict even though a lot of my stuff was still there.
Your wife may miss her more than you will. Please remember that her new place is hers. It will be her rules now and you must respect that.
Your daughter may be leaving but her stuff will clog up your house for years yet so you may still get moaned at for taking her screen wash.