More than just insulating you House you should also consider making it disability friendly. Particularly if you’re building a new one versus buying an existing one. It’s easier and cheaper while building to put in wider doors to accommodate wheelchairs and walkers than to refurbish an existing home. Likewise with lower light switches and higher power outlets (that can be more easily reached from a wheelchair) Entryways That are level with the outside so that wheelchairs can roll in easily, no carpeting for the same reason, etc. I grew up in a large family despite being an only child. We lived as a multigenerational family and were there in the house to take care of my grandparents on Mama’s side. With any luck at all, that’s the way I’ll age out as well; among family: the way it should be.