At our school, I know parents:
who have help from grandparents or other family members
one Dh works 80 hrs/wk so his 3 kids can attend & wife stay home
some families do get financial aid, up to 50% of grades tuition only
some have become teachers and therefore get tuition remission only pay 10%
some families have 'simplified' their lives so they could afford Waldorf w/o FA
some families have one parent making A LOT of money
some families use HELOCs (home equity line of credit) to pay tuition
some families have sold their homes & moved into less expensive housing
some families use saving
we even have a few (about 10) single moms on one income
some families take it one month at a time
many families drive late model cars
There are some people super passionate about Waldorf and will do anything to make sure their children get a Waldorf education. At our school, you do not have many wealthy people sending their kids there, it is more a middle class group. We have maybe 5 very wealthy families, and every Waldorf school need those! We are in one of the wealthiest counties in the USA, but most wealthly people are not attracted to Waldorf. The schools in the towns surrounding our school also have very good reputations and rank high in state testing (this does not matter to Waldorf parents but it does to most mainstream folks). The real estate taxes in these surrounding towns are also very high, so people paying for private schools around here want to see strong academic cirriculums early that rank high. People talk Harvard and Yale about kindergarteners.
