First, take an honest and careful look at your finances, Can you make some adjustments to how you spend money? Remembering that all of your money is actually God’s money (He owns it and you are just a manager), pray to God to help you know if you are spending His money in a way that honors Him. Look to see if you are spending money on things that only bring you short term pleasure rather than things eternal value. In light of all that and all that we have discussed here, ask yourself if you have placed less important things above the awesome God ordained task of educating your children the way God want you to rear them. Remember the words from Jesus in Matthew 6:33: “But seek first His kingdom and His righteousness, and all these things will be given to you as well.”
You may come to a sobering conclusion that you know that your child should be in a Christian school, but you have put your family in a position that makes it impossible to do so. If that is the case, make plans to make changes that will enable you to afford a Christian education, even if it will take 2-3 years before you accomplish the goal.
If you review your situation and simply can’t afford it, and you can’t make any changes to your personal budget/spending habits pray that God will make a way. Some schools offer financial aid to qualified applicants.