I am exactly going through the same as you ... only 2 weeks ahead of you!
I even posted a thread
https://www.daycare.com/forum/showth...=decided+close
The time between
reaching the decision to close and
having the last kid leave your daycare is very draining... I'm doing the countdown and trying to keep focused on March 30th to help me "going"... less than 3 weeks to go.