It really does raise the question almost 'reductio ad absurdum' as to why pay for secondary education.
The site is tiny and the facilities can't stretch much beyond classrooms and dining for 300.
The socialisation is going to be weird, rather like a village school with only 1 class per year.
Whilst you might save on morning commuting, you'll pay it back in spades to do science, drama, music, sport etc.
There will be the big school a few miles away where all the good stuff happens and you won't be there.
Without entrance exams the peer group will be mixed, just like any other school. If that's what you want, why pay?
Having said all this, I have no doubt it will be rammed from day 1.