Sounds like a wonderful setup. Have the kids ever shown a desire for public school? My brother is homeschooling his kids to start, but the oldest just asked to start going to public, so he sent her.

No, my wife and I discussed putting them into traditional school as they got older, but now that they are older, they have all strongly requested to remain in their homeschool co-op. I think the biggest reason is they have a good group of friends that they connect with, and have been their class mates for multiple years. So there is a strong desire to continue in the program with people they know.