Would an independent school have a sponsorship license for a child in reception though? That would seem to be a hurdle to me.... But yeah, this could be a feasible route. How long would they consider the course for though? If it's a primary school, would the length simply be one year? Or would it be the entire length of primary school (six years) and therefore you'd need the annual tuition x 6 to be able to qualify...
Yes, this was something that I had thought of as well. I'm not sure how many independent schools have licenses to sponsor student visas. And in regards to tuition, I don't know if the fees are the same for everyone, or if they are higher for international students.
But assuming that the school is able to sponsor visas, and the fees are affordable, I don't immediately see anything glaringly problematic about this approach. As far as I'm aware, all legal residence in the UK would count towards the 3-year requirement.
I can't find any guidance that specifically prohibits a Tier 4 child visa holder from switching within the UK to another category, so assuming the school placement works out, it appears that there is the possibility to switch to FLR once the parents are able to meet the financial requirement through UK employment.