At one point I had home...the mountain house and the shore house and that was insane.
Wherever I was I wanted to be at the other. I saw the kids more at the shore house, but they didn't come to the mountains much.
I ripped down the mountain place and built new, sold my full time place and relocated to the mountains 6 years ago.
Now I spend most late spring till fall weekends at the shore.
It's tough keeping multiple places especially if you have kids since they had so much to do, now that they have kids of their own it's still not easy with the grandkids so active.
As much time and money as it cost I would not have done it any differently or swap one second of the memories.