Saying it can't be done because of lack of wealth is a crutch and presents a lack of faith. If God said it, do it and watch it be blessed.
1. Compared with many in this world yes you are.
2. "Lack of wealth" ie poverty is one of the trials and tribulations which God provides to some of His children in this life. Your description and decision on the quote "lack of faith" is an insult to many suffering servants of Christ in the world.
It appears that you consider parental education as a qualification for "faith" - This is both unBiblical and deceitful. Your theology seems to stem from works based religion. It would be better that you trust in God, not in mans works, whichever mortal does the work.
"James 2:5 Hearken, my beloved brethren, Hath not God chosen the poor of this world rich in faith, and heirs of the kingdom which he hath promised to them that love him?"
Rufus wrote: Keeping your child home from state indoctrination is free. The majority of Christian adults know how to read, write and perform arithmetic. If an adult parent knows how to do these things that parent can train their child, it is not hard.
Sounds as though you live in an afffluent middle class community and position. Poverty and lack of education is not unusual in the circumstances of many Christians.
We live in a fallen world from which God saves His children. The fact that we have "fallen" schools is no surprise and God saves His children from that life too. "Correct" education is not a necessary qualification for Christian adulthood and life in Christ.