$6,000 / month in daycare for 4 kids? You have a sweet deal my friend. At the daycare in my neighborhood this does not cover even 2 kids : https://www.kidspaceseattle.org/enrollment - click on Tuition link at the bottom and weep.
Those prices are weird. Why would somebody ever pay that much rather than just hire a private nanny?
Only two are in daycare. LOL I wish it was for all 4. My autistic girls insurance cost I hit the OOP max in 2 months but still.