A lot of kids move back after college. I definitely wouldn’t downsize until my family was secure and for sure no longer needed the space.
Now the question is it better to allow that space sit vacant or rent out the space.
I think there is a defensible position for renting out a temporarily unused space in your primary home versus buying vacant properties solely to rent.
In this case I understand not downsizing until your kids are established with a job/place to live.
Depending on equity and their mortgage payment it may not even be possible to downsize without paying more per month. That’s the insanity of the current market.
Remember this is an occupied family home with an unoccupied room. Not a whole property.
What would you suggest?