1. The yeshivos are in a hopeless find since in effect they are paying for two schools and only can charge once. Two-hundred years ago the goyim’s school focused on a “classical” education, which they totally abandonned for a “modern” curriculum, and today they are totally ignorant of their own culture’s history and traditions and have become totally secular. We wisely refused to do so in our schools, but it means having to do a secular curriculum as well as a Jewish curriculum, which is expensive.
2. Compared to private schools (i.e. “prep schools”) most of our yeshivos are quite cheap, both in terms of “list”price and what people pay.
3. In big cities, one can shop around. If you are a zionist, you should probably be considering aliyah.
4. In America, home school is an option, but remember that the “opportunity cost” of one spouse (the wife) staying home, as well as the other spouse taking off time for work to be involved, will end up costing as much or more than tuition (especially if both spouses are college educated and have the option of gainful employment).
5. If the parents have the ability to homeschool in Torah subjects, public schools would be an option, however the problems of being “different” in a public school should not be underestimated. For all their rhetoric about diversity, American schools tend to prefer all students to act in the same predictable ways and the nails that stand out get hammered.