Counter offer, multigenerational homes. Let the kids stay at home for their entire lives if they want to. They can start paying a bit towards the bills once they are adults.

Oh yeah and a house with more than 2 adults working, especially once the mortgage is paid off? You could work 1 day a week each and have plenty of money.

I suppose as your kids get partners if half move out and half move in its sustainable there too. Keep at it and build up some intergenerational wealth?