Daughter 18 years old and currently on H4 - do I need to change her to F1

Hello - my daughter (18 yrs old) is a Senior in High School in California. She is eventually planning to apply to college and go for college studies.

Do I need to apply F1 Visa for her? Currently I am on H1B with a priority date Feb 2011 and awaiting.

Really appreciate any guidance on this. The moment I change her to F1 she will be treated as an international student as well that goes with higher tuition fee that I might not be able to afford as well. However, when she turns 21 her H4 becomes non-applicable since she will not be a dependent anymore after that age.

Seek some guidance on how to tackle this situation wisely.