LW should consider that their children's preschool will probably not have a say over which kindergarten the children go to, so the kids are going to have to make new friends anyway. Minneapolis has a lot of elementary schools, so there's a fair chance that exactly none of the preschool friends will end up in the relevant kindergarten or first grade classrooms.

I can understand that LW feels strongly about not changing homes often (or at all?), but there's a point where it negatively impacts their family's income and quality of life.