@moilmom Remember also…the vast majority of colleges do not guarantee to meet full need for all accepted students.
And a good chunk of the Profile Schools will also want a non-custodial parent Profile…which will include that household, and the incomes of the non-custodial parent and spouse (if there is one).
Remember too…that your household isn’t the only one contributing to the expenses of the three kiddos who don’t live with you. The parent (and step parent) in that household contribute as well.